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This blogpost takes a look at the technical differences between Oracle database 11.2.0.4 PSU 200714 (july 2020) and PSU 201020 (october 2020). This gives technical specialists an idea of the differences, and gives them the ability to assess if the PSU impacts anything.

Functions

code symbol names unique in version 11.2.0.4.200714 versus 11.2.0.4.201020

NAME                                                         RESOLVE                                            ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ -------------------------------------------------- ------------------------------------------------------------------------------------------ ------------------------------------------------------------
kglrfSetNiv                                                  (kgl)rfSetNiv                                      kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o

code symbol names unique in version 11.2.0.4.201020 versus 11.2.0.4.200714

NAME                                                         RESOLVE                                            ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ -------------------------------------------------- ------------------------------------------------------------------------------------------ ------------------------------------------------------------
__init_0.0                                                   __init_0.0                                         ??
jox_get_cbrls_lock                                           (jox)_get_cbrls_lock                               java jit compiler ??
kglNivHTComp                                                 (kgl)NivHTComp                                     kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o
kglNivHTHash                                                 (kgl)NivHTHash                                     kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o
kglrfAddNivHT                                                (kgl)rfAddNivHT                                    kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o
kglrfDestroyNivHT                                            (kgl)rfDestroyNivHT                                kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o
kglrfSetNivHT                                                (kgl)rfSetNivHT                                    kernel generic library cache management ??                                                 libgeneric11.a:kgl2.o
next_marker                                                  (n)ext_marker                                      network ??                                                                                 libjavavm11.a:jdmarker.o
slrac_end_lock                                               (slrac)_end_lock                                   operating system (dependent) library verify (memory) read access ??                        libgeneric11.a:slrac.o

This is a poor, yet one of the only ways, to understand what is going on inside the oracle executable.
There aren’t that many things removed or added. Of course this is version 11.2.0.4, for which this PSU might be the last one because of 11.2.0.4’s expiring extended support state.

Quite striking here too is the absence of all the changed libjava related functions, for which I don’t know if these function additions have anything to do with security. However, please mind I am not implying that this is not secure, I simply can’t tell.

For the added and removed functions for this version: the only function that was added in version 12.1.0.2 is slrac_end_lock, all the other changes to functions seem to be completely unique to version 11.2.0.4.
If you did read all the functions closely, you might have seen that actually there was one libjava related function changed, and that my name resolving showed its limitations, because it marked it as ‘network’. Well, it seems that certain things, like the java functions do not follow the oracle database layered naming by letters approach.
It also seems that for adding and removing functions, the functions are mainly library cache (kgl) related.

In the data dictionary there weren’t any changes spotted. Of course this overview focusses on availability of parameters and metadata (tables and their columns), for a look into the data dictionary you should look at the work of my colleague Rodrigo Jorge (dissecting the 201020 patches)

This blogpost takes a look at the technical differences between Oracle database 12.1.0.2 PSU 200714 (july 2020) and PSU 201020 (october 2020). This gives technical specialists an idea of the differences, and gives them the ability to assess if the PSU impacts anything.

Functions

code symbol names unique in version 12.1.0.2.200714 versus 12.1.0.2.201020

NAME                                                         RESOLVE                                            ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ -------------------------------------------------- ------------------------------------------------------------------------------------------ ------------------------------------------------------------
defCtx_GetRngCtx                                             defCtx_GetRngCtx                                   ??                                                                                         libnnzst12.a:ext_ztrsaadapter.o,libnnz12.a:ztrsaadapter.o
kgiflpop                                                     (kgi)flpop                                         kernel generic instantiation manager ??                                                    libgeneric12.a:kgi.o
kkfdGetQueReason                                             (kkfd)GetQueReason                                 kernel compile fast dataflow (PQ DFO) ??                                                   libserver12.a:kkfd.o
kkodpCheckPrefetch                                           (kkodp)CheckPrefetch                               kernel compile optimizer AQP ??                                                            libserver12.a:kkodp.o
kkodpHJLegal                                                 (kkodp)HJLegal                                     kernel compile optimizer AQP ??                                                            libserver12.a:kkodp.o
kkogimpCheckIMCValidity                                      (kko)gimpCheckIMCValidity                          kernel compile optimizer ??                                                                libserver12.a:kkoop.o
knasnblp2                                                    (knas)nblp2                                        kernel replication apply server ??                                                         libserver12.a:knasn.o
krvxuc                                                       (krvx)uc                                           kernel redo recovery extract ??                                                            libserver12.a:krvx.o
ksfd_estimate_fobpools                                       (ksfd)_estimate_fobpools                           kernel service functions disk IO ??                                                        libserver12.a:ksfd.o
ktcnq_get_typesize                                           (ktc)nq_get_typesize                               kernel transaction control component ??                                                    libserver12.a:ktcnq.o
ktuTempAddExtent_swcbk                                       (ktu)TempAddExtent_swcbk                           kernel transaction undo ??                                                                 libserver12.a:ktu.o
ztchmd5m                                                     (zt)chmd5m                                         security encryption ??                                                                     libnnzst12.a:ext_ztchmd5.o,libnnz12.a:ztchmd5.o
ztcriv                                                       (zt)criv                                           security encryption ??                                                                     libnnzst12.a:ext_ztcr.o,libnnz12.a:ztcr.o
ztcrsg                                                       (zt)crsg                                           security encryption ??                                                                     libnnzst12.a:ext_ztcr.o,libnnz12.a:ztcr.o

code symbol names unique in version 12.1.0.2.201020 versus 12.1.0.2.200714

NAME                                                         RESOLVE                                            ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ -------------------------------------------------- ------------------------------------------------------------------------------------------ ------------------------------------------------------------
kcbo_exam_buf                                                (kcbo)_exam_buf                                    kernel cache buffers object queue ??                                                       libserver12.a:kcbo.o
kgnfs_isstaterenewal                                         (kgnfs)_isstaterenewal                             kernel generic network file system ??                                                      libgeneric12.a:kgnfs.o
kjbrnd2dummy                                                 (kjbr)nd2dummy                                     kernel lock management global cache service resource table ??                              libserver12.a:kjbr.o
kkfd_par_all                                                 (kkfd)_par_all                                     kernel compile fast dataflow (PQ DFO) ??                                                   libserver12.a:kkfd.o
kkqjpdClearFroCtx                                            (kkqjpd)ClearFroCtx                                kernel compile query  join analysis predicate push down ??                                 libserver12.a:kkqjpd.o
kksResetPMONSessionState                                     (kks)ResetPMONSessionState                         kernel compile shared objects (cursor) ??                                                  libserver12.a:kks1.o
knasnblp2l                                                   (knas)nblp2l                                       kernel replication apply server ??                                                         libserver12.a:knasn.o
knasnblp2lr                                                  (knas)nblp2lr                                      kernel replication apply server ??                                                         libserver12.a:knasn.o
kokaugi_iobs                                                 (koka)ugi_iobs                                     kernel objects kernel side access ??                                                       libserver12.a:koka.o
krvxpcls                                                     (krvx)pcls                                         kernel redo recovery extract ??                                                            libserver12.a:krvx.o
ktuAddTrsp                                                   (ktu)AddTrsp                                       kernel transaction undo ??                                                                 libserver12.a:ktu.o
ktuFindTrsp                                                  (ktu)FindTrsp                                      kernel transaction undo ??                                                                 libserver12.a:ktu.o
ktuGetTseg                                                   (ktu)GetTseg                                       kernel transaction undo ??                                                                 libserver12.a:ktu.o
ktuTempsoClnUp_pdcbk                                         (ktu)TempsoClnUp_pdcbk                             kernel transaction undo ??                                                                 libserver12.a:ktu.o
ktuTempsoClnUp_single                                        (ktu)TempsoClnUp_single                            kernel transaction undo ??                                                                 libserver12.a:ktu.o
nzosGetCipherDetails                                         (nz)osGetCipherDetails                             network security ??                                                                        libnnz12.a:ext_nzos.o,libnnzst12.a:ext_nzos.o
nzosGetCipherDetails2                                        (nz)osGetCipherDetails2                            network security ??                                                                        libnnz12.a:ext_nzos.o,libnnzst12.a:ext_nzos.o
nzosGetCipherList                                            (nz)osGetCipherList                                network security ??                                                                        libnnz12.a:ext_nzos.o,libnnzst12.a:ext_nzos.o
nzosGetDefaultCipherlist                                     (nz)osGetDefaultCipherlist                         network security ??                                                                        libnnz12.a:ext_nzos.o,libnnzst12.a:ext_nzos.o
qksceCEContainerMismatch                                     (qksce)CEContainerMismatch                         query kernel sql cursor evaluation ??                                                      libserver12.a:qksce.o
slrac_end_lock                                               (slrac)_end_lock                                   operating system (dependent) library verify (memory) read access ??                        libgeneric12.a:slrac.o

This is a poor, yet one of the only ways, to understand what is going on inside the oracle executable.
There aren’t that many things removed or added. Of course this is version 12.1, which is not what I believe to be the 12.2 releases of 12.2.0.1, 18 and 19, so a truly different version/release.

Also quite striking is the absence of all the changed libjava related functions, for which I don’t know if these function additions have anything to do with security. However, please mind I am not implying that this is not secure, I simply can’t tell.

Also, the functions that are removed and added do not seem to have any relationship with the added and removed functions in 12.2 and up. That might indicate that the PSU purely focussed on security updates to existing functions and issues that were logged against this version.

In the data dictionary there weren’t any changes spotted. Of course this overview focusses on availability of parameters and metadata (tables and their columns), for a look into the data dictionary you should look at the work of my colleague Rodrigo Jorge (dissecting the 201020 patches)

This blogpost takes a look at the technical differences between Oracle database 12.2.0.1 PSU 200714 (july 2020) and PSU 201020 (october 2020). This gives technical specialists an idea of the differences, and gives them the ability to assess if the PSU impacts anything.

Functions


code symbol names unique in version 12.2.0.1.200714 versus 12.2.0.1.201020

NAME                                                         RESOLVE                                                      ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------------------------------------ ------------------------------------------------------------
NAME                                               RESOLVE                                            ANNOTATION                                                                       ARCHIVE_OBJECT                                                 COUNT(*)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------------------------------------- ------------------------------------------------------------ ----------
kcbo                                               kcbo                                               kernel cache buffers object queue                                                                                                                      1
kkdl                                               kkdl                                               kernel compile dictionary lookup                                                                                                                       1
kmgs                                               kmgs                                               kernel multi threaded/mman manage (sga) space (?)                                                                                                      1
kzpR                                               (kzp)R                                             kernel security privileges ??                                                                                                                          1
qcso                                               qcso                                               query compile semantic analysis (parser) OBJECTS                                                                                                       1
qeae                                               qeae                                               query execute aggregate (order by) elimination (?)                                                                                                     1
qkaI                                               (qka)I                                             query kernel allocation ??                                                                                                                             1
qkex                                               (qke)x                                             query kernel expressions ??                                                                                                                            1
qksh                                               (qks)h                                             query kernel sql ??                                                                                                                                    1
qksp                                               (qks)p                                             query kernel sql ??                                                                                                                                    1
krvx                                               krvx                                               kernel redo recovery extract                                                                                                                           2
kxtt                                               kxtt                                               kernel execution temporary table operations                                                                                                            2
Java                                               Java                                               java classes                                                                                                                                           6

code symbol names unique in version 12.2.0.1.201020 versus 12.2.0.1.200714

NAME                                               RESOLVE                                            ANNOTATION                                                                       ARCHIVE_OBJECT                                                 COUNT(*)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------------------------------------- ------------------------------------------------------------ ----------
ECGr                                               (EC)Gr                                             elleptic curve cryptography ??                                                   libjavavm12.a:ecl.o                                                   7
Java                                               Java                                               java classes                                                                     libjavavm12.a:ShapeSpanIterator.o                                     7
ec_G                                               (ec_)G                                             elleptic curve cryptography ??                                                   libjavavm12.a:ecp_jac.o                                               7
mp_c                                               (mp_)c                                             multiple precision cryptography ??                                               libjavavm12.a:mpi.o                                                   7
mp_i                                               (mp_)i                                             multiple precision cryptography ??                                               libjavavm12.a:mpi.o                                                   7
mp_t                                               (mp_)t                                             multiple precision cryptography ??                                               libjavavm12.a:mpi.o                                                   7
mp_b                                               (mp_)b                                             multiple precision cryptography ??                                               libjavavm12.a:mp_gf2m.o                                               8
mp_s                                               (mp_)s                                             multiple precision cryptography ??                                               libjavavm12.a:mpi.o                                                  11
ec_G                                               (ec_)G                                             elleptic curve cryptography ??                                                   libjavavm12.a:ecl_gf.o                                               21
s_mp                                               s_mp                                               cryptography multiple precision                                                  libjavavm12.a:mpi.o                                                  49

This is a poor, yet one of the only ways to understand what is going on inside the oracle executable.
There aren’t that many thing removed, which is understandable, this is an update. 20 functions have been removed in total. The archive:object annotation is not there, I started doing that for the latest PSU.
For the functions that were added, the vast majority comes from libjavavm18, and seem to be cryptographic related functions.

It should be noted that if you compare the added functions and the changed functions with the Oracle 18 ones, a fair share of them are equal, but there are also functions unique to each version. Of course the equal functions probably are related to huge issues that must be fixed in all versions. The functions that are unique to this version are likely to be (minor-)version specific issues.

This blogpost takes a look at the technical differences between Oracle database 18 RU 11 (july 2020) and RU 12 (october 2020). This gives technical specialists an idea of the differences, and gives them the ability to assess if the RU impacts anything.

Functions


code symbol names unique in version 18.11 versus 18.12 -- so removed functions in RU 12.

NAME                                                         RESOLVE                                                      ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------------------------------------ ------------------------------------------------------------
Java_sun_java2d_pipe_ShapeSpanIterator_appendCubic           (Java_sun_java2d_pipe_ShapeSpanIterator_)appendCubic         java classes sun. java2d. pipe. ShapeSpanIterator. ??
Java_sun_java2d_pipe_ShapeSpanIterator_appendLine            (Java_sun_java2d_pipe_ShapeSpanIterator_)appendLine          java classes sun. java2d. pipe. ShapeSpanIterator. ??
Java_sun_java2d_pipe_ShapeSpanIterator_appendQuadratic       (Java_sun_java2d_pipe_ShapeSpanIterator_)appendQuadratic     java classes sun. java2d. pipe. ShapeSpanIterator. ??
Java_sun_java2d_pipe_ShapeSpanIterator_beginSubpath          (Java_sun_java2d_pipe_ShapeSpanIterator_)beginSubpath        java classes sun. java2d. pipe. ShapeSpanIterator. ??
Java_sun_java2d_pipe_ShapeSpanIterator_endPath               (Java_sun_java2d_pipe_ShapeSpanIterator_)endPath             java classes sun. java2d. pipe. ShapeSpanIterator. ??
Java_sun_java2d_pipe_ShapeSpanIterator_getCPathConsumer      (Java_sun_java2d_pipe_ShapeSpanIterator_)getCPathConsumer    java classes sun. java2d. pipe. ShapeSpanIterator. ??
kkdlpGetObjn                                                 (kkdl)pGetObjn                                               kernel compile dictionary lookup ??
kxttSCNGet                                                   (kxtt)SCNGet                                                 kernel execution temporary table operations ??
kxttSCNGetBoth                                               (kxtt)SCNGetBoth                                             kernel execution temporary table operations ??
kzpRoleEnabled                                               (kzp)RoleEnabled                                             kernel security privileges ??
qkspmTravInit                                                (qkspm)TravInit                                              query kernel sql plan management ??
skgpgprocstat                                                (skg)pgprocstat                                              operating system dependent kernel generic ??
skgpgthrstat                                                 (skg)pgthrstat                                               operating system dependent kernel generic ??

code symbol names unique in version 18.11 versus 18.12 (top 11) -- so added in the RU 12.

NAME                                               RESOLVE                                            ANNOTATION                                                                       ARCHIVE_OBJECT                                                 COUNT(*)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------------------------------------- ------------------------------------------------------------ ----------
ECGr                                               (EC)Gr                                             elleptic curve cryptography ??                                                   libjavavm18.a:ecl.o                                                   7
Java                                               Java                                               java classes                                                                     libjavavm18.a:ShapeSpanIterator.o                                     7
ec_G                                               (ec_)G                                             elleptic curve cryptography ??                                                   libjavavm18.a:ecp_jac.o                                               7
mp_c                                               (mp_)c                                             multiple precision cryptography ??                                               libjavavm18.a:mpi.o                                                   7
mp_i                                               (mp_)i                                             multiple precision cryptography ??                                               libjavavm18.a:mpi.o                                                   7
mp_t                                               (mp_)t                                             multiple precision cryptography ??                                               libjavavm18.a:mpi.o                                                   7
mp_b                                               (mp_)b                                             multiple precision cryptography ??                                               libjavavm18.a:mp_gf2m.o                                               8
mp_s                                               (mp_)s                                             multiple precision cryptography ??                                               libjavavm18.a:mpi.o                                                  11
kewr                                               kewr                                               kernel event AWR repository                                                      libserver18.a:kewr.o                                                 14
ec_G                                               (ec_)G                                             elleptic curve cryptography ??                                                   libjavavm18.a:ecl_gf.o                                               21
s_mp                                               s_mp                                               cryptography multiple precision                                                  libjavavm18.a:mpi.o                                                  49

This is a poor, yet one of the only ways to understand what is going on inside the oracle executable.
There aren’t that many thing removed, which is understandable. Therefore I listed all the functions that were removed, not a as a grouped overview. The archive:object annotation is not there, I started doing that for the latest RU.
For the functions that were added, the vast majority comes from libjavavm18, and seem to be cryptographic related functions.

The only group that might show something is kewr (AWR), however I cannot see something in general that is changed, the names seem random:

NAME                                                         RESOLVE                                                      ANNOTATION                                                                                 ARCHIVE_OBJECT
------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------------------------------------ ------------------------------------------------------------
kewramcs_app_map_condbid_str                                 (kewr)amcs_app_map_condbid_str                               kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewramvn_append_mdb_vvwname                                  (kewr)amvn_append_mdb_vvwname                                kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewraxc_attribute_xcb                                        (kewr)axc_attribute_xcb                                      kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrbtsg_build_topseg                                        (kewr)btsg_build_topseg                                      kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrccsq_collect_csql                                        (kewr)ccsq_collect_csql                                      kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrgcfes_get_cacheid_from_enum_str                          (kewr)gcfes_get_cacheid_from_enum_str                        kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrmplvl_map_snap_level                                     (kewr)mplvl_map_snap_level                                   kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrpfbue_pdb_from_buffer_entry                              (kewr)pfbue_pdb_from_buffer_entry                            kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrptsq_prep_topsql                                         (kewr)ptsq_prep_topsql                                       kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrrdsi_rank_dstat_item                                     (kewr)rdsi_rank_dstat_item                                   kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrrtsq_rank_topsql                                         (kewr)rtsq_rank_topsql                                       kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrsaobn_set_all_objnames                                   (kewr)saobn_set_all_objnames                                 kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrsonie_set_object_names_in_entry                          (kewr)sonie_set_object_names_in_entry                        kernel event AWR repository ??                                                             libserver18.a:kewr.o
kewrsqlc_sql_iscolored_cb                                    (kewr)sqlc_sql_iscolored_cb                                  kernel event AWR repository ??                                                             libserver18.a:kewr.o

Outside of code changes, there isn’t anything changed in the data dictionary.

This blogpost takes a look at the technical differences between Oracle database 19 RU 8 (july 2020) and RU 9 (october 2020). This gives technical specialists an idea of the differences, and gives them the ability to assess if the RU impacts anything.

Functions


code symbol names unique in version 19.8 versus 19.9 (top 5) -- so removed in the 19.9 RU

NAME                                               RESOLVE                                            ANNOTATION                                                                       ARCHIVE_OBJECT                                                 COUNT(*)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------------------------------------- ------------------------------------------------------------ ----------
qsod                                               (qs)od                                             query system ??                                                                                                                                        3
ZSTD                                               ZSTD                                               Zstandard. fast lossless compression algorithm                                                                                                         4
qjsn                                               qjsn                                               query json                                                                                                                                             5
Java                                               Java                                               java classes                                                                                                                                           6
qcpi                                               qcpi                                               query compile parse interim                                                                                                                            6

code symbol names unique in version 19.9 versus 19.8 (top 10) -- so added in the 19.9 RU

NAME                                               RESOLVE                                            ANNOTATION                                                                       ARCHIVE_OBJECT                                                 COUNT(*)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------------------------------------- ------------------------------------------------------------ ----------
qsod                                               (qs)od                                             query system ??                                                                  libclntst19.a:generic19_qsodax.o,libgeneric19.a:qsodax.o              8
mp_s                                               (mp_)s                                             multiple precision cryptography ??                                               libjavavm19.a:mpi.o                                                  11
qcpi                                               qcpi                                               query compile parse interim                                                      libclntst19.a:generic19_qcpi7.o,libgeneric19.a:qcpi7.o               11
ksac                                               (ksa)c                                             kernel service asynchronous messages ??                                          libserver19.a:ksacl.o                                                13
jznO                                               (jzn)O                                             json ??                                                                          libxml19.a:jznoct.o,libclntst19.a:xml19_jznoct.o                     15
qjsn                                               qjsn                                               query json                                                                       libserver19.a:qjsn.o                                                 15
jznt                                               (jzn)t                                             json ??                                                                          libxml19.a:jzntrans.o,libclntst19.a:xml19_jzntrans.o                 19
jzno                                               (jzn)o                                             json ??                                                                          libxml19.a:jznoct.o,libclntst19.a:xml19_jznoct.o                     20
ec_G                                               (ec_)G                                             elleptic curve cryptography ??                                                   libjavavm19.a:ecl_gf.o                                               21
s_mp                                               s_mp                                               cryptography multiple precision                                                  libjavavm19.a:mpi.o                                                  49

This is a poor, yet one of the only ways to understand what is going on inside the oracle executable.

There aren’t that many thing removed, which is understandable.
I show the the top 11 of function groups that are added, because their numbers are significant (more than 10).
In general, what I see is most functions are related to cryptography, which is understandable and logical in today’s world.
Additionally, there’s a lot of movement with JSON related libraries, this is also understandable, and probably a lot of the functions are related to DBMS_SODA.
Obviously, there is more changed as we can see below from the parameters (which are switches for bug fixes), and other changes, but the function changes doe not indicate huge groupings of functions to be added or removed outside of the groups indicated above.

Parameters

parameters unique in version 19.8 versus 19.9

NAME
--------------------------------------------------
_eleventh_spare_parameter
_nineteenth_spare_parameter
_one-hundred-and-seventy-fourth_spare_parameter
_one-hundred-and-sixty-eighth_spare_parameter
_thirteenth_spare_parameter
_twentieth_spare_parameter
_twenty-eighth_spare_parameter
_twenty-fifth_spare_parameter
_twenty-first_spare_parameter
_twenty-fourth_spare_parameter
_twenty-seventh_spare_parameter
_twenty-sixth_spare_parameter
_twenty-third_spare_parameter

parameters unique in version 19.9 versus 19.8

NAME
--------------------------------------------------
_bug28482048_fb_log_max_rereads
_bug29504103_runtime_index_key_length_check
_bug30159581_cputime_limit_parallel_fptr
_bug30159581_runtime_limit_parallel_fptr
_bug30165506_enable_unified_memory
_bug30165506_unified_pga_gran_leak_timeout
_bug30165506_unified_pga_list_count
_bug30165506_unified_pga_max_pool_size
_bug31747989_cputime_limit_parallel_fptr
_bug31747989_runtime_limit_parallel_fptr
_ipacl_feature_control_flags
_ldap_use_all_direct_groups_only
_pdb_transition_clean_bg_delay

Once again, this is quite consistent, ‘spare’ parameters being swapped for lots of ‘_bugnnnnnnn_description’ parameters, and a few other underscore parameters.
There are no new documented parameters.

Waitevents

waitevents unique in version 19.8 versus 19.9

NAME
----------------------------------------------------------------------------------------------------
second spare wait event

waitevents unique in version 19.9 versus 19.8

NAME
----------------------------------------------------------------------------------------------------
unified memory allocation

A new wait event was added with PSU 19.9! A ‘spare’ wait event was changed to ‘unified memory allocation’. I do not have more information about this, and have not heard about ‘unified memory’ before.

Sysstat

sysstat statistics unique to 19.8 versus 19.9

NAME
----------------------------------------------------------------------------------------------------
cell RDMA reads
cell pmem cache read hits
spare statistic 1
spare statistic 2

sysstat statistics unique to 19.9 versus 19.8

NAME
----------------------------------------------------------------------------------------------------
cell RDMA reads
cell RDMA reads unused
cell pmem cache read hits
cell pmem cache read hits unused

A few statistics have been added! Quite logically this is related to RDMA and pmem (persistent memory). It looks like existing statistics have been moved to a new statistics number, and the ‘old’ ones have gotten an addition saying ‘unused’. It’s understandable and known that oracle is putting efforts in the area’s of RDMA, where it seems the usage of RDMA is expanded all the time to increase performance of RAC cross instance communication, and pmem is new and currently officially implemented for Exadata. I do not know if the above statistic is the exadata related pmem cache, or if this is a local machine pmem implementation.

DBA/CDB views

dba tables unique to 19.8 versus 19.9

dba tables unique to 19.9 versus 19.8

NAME
----------------------------------------------------------------------------------------------------
DBA_SUBSCR_DUR_REGISTRATIONS

cdb tables unique to 19.8 versus 19.9

cdb tables unique to 19.9 versus 19.8

NAME
----------------------------------------------------------------------------------------------------
CDB_SUBSCR_DUR_REGISTRATIONS

It seems there is a DBA and CDB scope view added.

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