12c: Warning Message About Heavy Swapping Observation and ORA-700 [kskvmstatact: excessive swapping observed]
Last updated on SEPTEMBER 04, 2017
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 12.1 to 12.2]
Information in this document applies to any platform.
Alert log reports frequent information about memory being swapped like below:
WARNING: Heavy swapping observed on system in last 5 mins.
pct of memory swapped in [2.70%] pct of memory swapped out [0.00%].
Please make sure there is no memory pressure and the SGA and PGA
are configured correctly. Look at DBRM trace file for more details.
Errors in file /orasw01/oracle/diag/rdbms/elfadev/ELFADEV/trace/ELFADEV_dbrm_21092.trc (incident=16909):
ORA-00700: soft internal error, arguments: [kskvmstatact: excessive swapping observed], , , , , , , , , , , 
Incident details in: /orasw01/oracle/diag/rdbms/elfadev/ELFADEV/incident/incdir_16909/ELFADEV_dbrm_21092_i16909.trc
The sum of the pct memory swapped in and swapped out always appears to be higher that 2%.
The DBRM trace file shows information similar to:
Heavy swapping observed in last 5 mins: [pct of total memory][bytes] total swpin [ 3.60%][599496K], total swpout [ 0.00%][0K] vm stats captured every 30 secs for last 5 mins: swpin: swpout: [ 0.07%][ 12416K] [ 0.00%][ 0K] [ 0.38%][ 63712K] [ 0.00%][ 0K] [ 0.05%][ 9432K] [ 0.00%][ 0K] [ 0.81%][ 135488K] [ 0.00%][ 0K] [ 0.35%][ 59032K] [ 0.00%][ 0K] [ 0.22%][ 37744K] [ 0.00%][ 0K] [ 0.35%][ 58544K] [ 0.00%][ 0K] [ 0.62%][ 104592K] [ 0.00%][ 0K] [ 0.56%][ 93368K] [ 0.00%][ 0K] [ 0.15%][ 25168K] [ 0.00%][ 0K] Heavy swapping observed in last 5 mins: [pct of total memory][bytes]
The call stack trace is similar to
... kskvmstatact kskdbrmtoutact ksbcti ksbabs ksbrdp opirip opidrv sou2o ...
Upgraded to version 12.1.
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