Recently I upgraded 11.2.0.4
RAC to 12.1.0.2 on Linux. After upgrading both GI and Database to 12.1.0.2 started seeing “ORA-700 [kskvmstatact: excessive
swapping observed]” alerts frequently.
Below is the alert log
content when we got the alert:
WARNING: Heavy swapping observed on
system in last 5 mins.
pct of memory swapped in [1.96%] pct
of memory swapped out [0.41%].
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
/u01/app/oracle/diag/rdbms/orcl/ORCL1/trace/ORCL1_dbrm_14607.trc (incident=37241):
ORA-00700: soft internal error,
arguments: [kskvmstatact: excessive swapping observed], [], [], [], [], [], [],
[], [], [], [], []
Every time when I get the alert observed sum of the pct memory swapped in and swapped out always
higher than 2%. In this case swapped in is 1.96% and swapped out is 0.41%, i.e.
total of 2.37%.
Solution:-
This is
the expected behavior in 12c and no solution to get rid of this error for now.
Bug 19495842 is there to change
the threshold in the swap warning in the alert log in future releases. But, we
need to bear this alert in 12.1.0.2 :).
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