Bug |
Description |
Included in RU? |
Comments |
Document 30329209.8 |
High wait on row cache mutex after upgrading to 12.2.0.1 and above |
Yes, from 19.8 onwards |
Apply 19.8 or above |
Document 31933451.8 |
High row cache mutex contention |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 29523216.8 |
Major performance bug for dc_users row cache |
Yes, from 19.7 onwards |
Apply 19.7 or above |
Document 30712670.8 |
High row cache mutex contention for queries with dblink (dc_props / dc_cdbprops) |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 30431274.8 |
High row cache mutex contention (ktatminextsz) — regression of 22909260 |
Yes, from 19.7 onwards |
Apply 19.7 or above |
Document 29628647.8 |
High CPU for DESCRIBE command due to contention in dc_users rowcache |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 32043701.8 |
row cache lock for sequences in RAC due to S-optimization feature for dc_sequences |
No |
Get one-off backport |
Document 30489582.8 |
Hanganalyze trace unable to identify the blocker of «row cache lock» in RAC |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 30327149.8 |
GEN0 process in RAC waiting on ktatminextsz while reading rowcache |
Yes, from 19.7 onwards |
Apply 19.7 or above |
Document 30720844.8 |
CLMN process waits on ‘library cache: mutex X’ and/or might cause ORA-600 [kglrfcl_1] |
Yes, from 19.8 onwards |
Apply 19.8 or above |
Document 30384121.8 |
LCK process in RAC holds mutex in kglHandleMessage causing database hang |
Yes, from 19.7 onwards |
Apply 19.7 or above |
Document 32356628.8 |
Huge waits on ‘library cache: mutex X’ with audit enabled for ‘select any table’ privilege |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 28889389.8 |
High waits on ‘cursor:mutex X’ after upgrade |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 31211220.8 |
High version count (cursor leaks) due to BIND_EQUIV_FAILURE mismatch |
No |
Get one-off backport |
Document 31471376.8 |
ORA-04024: SELF-DEADLOCK DETECTED WHILE TRYING TO MUTEX PIN CURSOR |
No |
Get one-off backport |
Document 20319830.8 |
Latch Get and Free Functions Available for Shared Parent-Child Latches |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 31602782.8 |
ORA-12850/ORA-12872 or huge waits on ‘cursor: pin S wait on X’ with parallel execution |
Yes, from 19.14 onwards |
Apply 19.14 or above |
Document 31753692.8 |
High waits on ‘cursor: pin S wait on X’ and ‘cursor: mutex X’ with PX_MISMATCH |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 30293345.8 |
Waits for latch: MGA Shared Context Latch After Migration to 18c or above |
Yes, from 19.8 onwards |
Apply 19.8 or above |
Document 30614411.8 |
Huge delay in LGWR BOC (Broadcast-on-commit) processing in RAC |
Yes, from 19.8 onwards |
Apply 19.8 or above |
Document 31827912.8 |
High waits for ‘log file sync’ & ‘remote write sync’ in RAC ADG with Fast-Start Failover (FSFO) |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 31176502.8 |
LGWR Hangs during log switch after Upgrade to 19c in RAC due to Cache Fusion Write Hang |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 31331038.8 |
ORA-600 error in ADG SYNC mode on Exadata with PMEMlog |
No |
Get one-off if Exadata |
Document 32249371.8 |
High ‘log file parallel write’ waits on Exadata due to single HCA bottleneck |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32498752.8 |
ORA-600 [ksu_get_available_pso: numa mismatch] signaled when using parallel LGWR |
No |
Get one-off backport |
Document 30978554.8 |
GC hang on read-mostly object or ORA-481 in RAC |
Yes, from 19.9 onwards |
Apply 19.9 or above |
Document 32035536.8 |
Sessions Blocked by ‘gc current request’ in RAC |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 28697526.8 |
Session Hangs On ‘gc cr request’ And Other Sessions Wait On ‘cr request retry’ |
Yes, from 19.9 onwards |
Apply 19.9 or above |
Document 32227352.8 |
High CPU with set role command |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 31812824.8 |
Slow performance with set role command |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 28889730.8 |
«Insert As Select» or a «Create Table As Select» command consume huge space |
Yes, from 19.4 onwards |
Apply 19.4 or above |
Document 32379140.8 |
LCK process in RAC crashes due to ORA-07445 [kjcvmsn()+128] [SIGSEGV] |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 30240930.8 |
Scheduler Jobs Time Classified as Background Instead of Foreground |
Yes, from 19.9 onwards |
Apply 19.9 or above |
Document 29932310.8 |
AWR Report Generation Takes Long time in 19c |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 31489731.8 |
ORA-600/ORA-7445 While Shared Pool Memory is Being Freed |
No |
Get one-off backport |
Document 31892767.8 |
Improvement to Temp Space Shrink |
No |
Get one-off backport |
Document 32465193.8 |
ORA-4031 Due to high SQL Monitoring allocations in Shared Pool |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 31820859.8 |
ORA-4025 Due To 65535 Active Locks Limit Reached On Select NLS_CHARSET_ID |
Yes, from 19.9 onwards |
Apply 19.9 or above |
Document 30887989.8 |
ORA-00001 While Generating AWR Snapshot in non-CDB with Resource Manager enabled |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 29423227.8 |
Drop Partition with global indexes hangs on library cache lock |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 32234161.8 |
Performance Slow due to High CPU post July 2020 DBRU (19.8) caused by Space Management slave processes (Wnnn) |
Yes, from 19.10 onwards |
Apply 19.10 or above |
Document 29454450.8 |
High waits on «latch: cache buffers chains» in RAC |
Yes, from 19.9 onwards |
Apply 19.9 or above |
Document 31563138.8 |
Securefile mutex waits when many inserts occurring on Securefile compressed LOB |
Yes, from 19.11 onwards |
Apply 19.11 or above |
Document 32103628.8 |
High Latch Free Waits While Flushing Top Segment Statistics in AWR |
No |
Get one-off backport |
Document 33123985.8 |
DBW0 Process Generate Huge Traces With Dumping DBWR Process State After DBRU 19.11 |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32936537.8 |
Significant Contention on «library cache: mutex X» While accessing Interval or Auto-List Partitioned table Concurrently |
No |
Get one-off backport |
Document 32148419.8 |
High Row Cache Lock Waits on Alter Table Exchange Partition in RAC Environment |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 30662963.8 |
High contention for «latch: MGA shared context root latch» When Many Sessions are Logging out |
No |
Get one-off backport |
Document 32550751.8 |
ONLY FOR AIX: Performance issues due to MGA related operations in AIX |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 33352794.8 |
ONLY FOR AIX: High waits on ‘latch: MGA shared context root latch’ and ‘latch: MGA shared context latch’ even with Fix 32550751 |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32117253.8 |
High «enq: RO — fast object reuse» waits & active checkpoint queue latch gets |
Yes, from 19.12 onwards |
Apply 19.12 or above |
Document 30710917.8 |
Cursor: mutex S waits due to High Version Count For SQL Statements using Bind variables and DBLINK From 12.2 |
No |
Get one-off backport |
Document 33025005.8 |
Waits on ‘latch: cache buffers chains’ after Database Upgrade from 12.1.0.2 to 19c |
No |
Get one-off backport |
Document 31387123.8 |
High Waits on ‘enq: IV — contention’ observed in RAC Standby environment |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32225742.8 |
Gathering Statistics in Primary DB Results in ORA-4061/ORA-4065 in Secondary DB |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32069508.8 |
High Latch: Cache Buffers Chains Contention in Standby Database |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 32119144.8 |
Large Buffer Cache on Exadata Disables Smart Scan for Parallel Queries |
No |
Get one-off backport |
Document 33163187.8 |
High Version Count due To «Bind Mismatch» Even When Using Same Bind Values |
No |
Get one-off backport |
Document 32755517.8 |
High Version count with USER_BIND_PEEK_MISMATCH for SQLs with bind peeking disabled |
Yes, from 19.13 onwards |
Apply 19.13 or above |
Document 33121934.8 |
Library cache lock / load lock / mutex x during connection storm due to update user$ |
No |
Get one-off backport |