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ORA-04031 Errors Occurring (Doc ID 2063751.1) SYMPTOMS ORA-04031 Errors Occurring ORA-04031 errors occurring in a RAC instance with the trace file showing high memory usage for "ges resource dynamic" and "ges enqueues" memory in the shared pool.  This can cause LMD processes to become unresponsive leading to an instance termination. The following query can be used to determine if this fix will help: select substr(RESOURCE_NAME,instr(RESOURCE_NAME,'[',1,3)+1,2) , MASTER_NODE, count(*)   from gv$ges_resource   where substr(RESOURCE_NAME,instr(RESOURCE_NAME,'[',1,3)+1,2) in ('DX', 'BB')   group by substr(RESOURCE_NAME,instr(RESOURCE_NAME,'[',1,3)+1,2), MASTER_NODE    order by 3 desc; If that shows a large number of entries (much larger than the expected total number of transactions), then this fix will help. CAUSE for ORA-04031 This is due to unpublished bug:21373473 fixed in 12.2, and occurs due to DX and BB locks being cached b...

ORA-02051 Another Session Or Branch In Same Transaction Failed (Doc ID 2253226.1)          SYMPTOMS for ORA-02051 Another Session Or Branch In Same Transaction Failed. Database performance is slow and caused   the transactions ORA-02051 another session or branch in same transaction failed or finalized CAUSE for ORA-02051 Another Session Or Branch In Same Transaction Failed. Session transactions branches caused the issue Excessive Waits On The Event "Global transaction acquire instance locks" SOLUTION Please use below sql and identified underscore parameter values for ORA-02051 Another Session Or Branch In Same Transaction Failed : SQL> select a.ksppinm "Parameter", b.ksppstvl "Session Value",c.ksppstvl "Instance Value"  FROM x$ksppi a,x$ksppcv b, x$ksppsv c  WHERE a.indx = b.indx AND a.indx = c.indx AND a.ksppinm LIKE '/_%' escape '/'  AND (a.ksppinm like '%clusterwide_global%' or a.ksppinm like '%disable_autotune_...