Arch process using more swap space

Hi,
DB : 11.2
OS : Aix 6
While taking archive backup by oem,only 9 archive process consuming more swap space.
The parameter value is LOG_ARCHIVE_MAX_PROCESSES=15 at db level.
Why only 9 archive process use swap space at os level?
how to determine all the archive process needed?
Thanks & Regards,
VN

user3266490 wrote:
Hi,
Thanks for your reply.
Physical memory 120 GB,Swap space 45GB.
We getting TOP consuming SWAP space PID's from OS team.Then we checked v$session with that PID's.We found that PID's belongs to archive processes.
Nealry 25 log switch per hour happened.the log file size 8gb,8 groups. Then REDO log files is is way too small by around a factor of SIX
Increase REDO log file size to 50GB to reduce the number of switches per hour to around 3 0r 4.

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c.     If DB session is found and it does not timeout after 2 hours,
it kills the process from unix (which in turn kills the DB session). Output is emailed.
This are the files required for this;
1. Cron job which calls the shell script looks like this;
# Kill form runaway process, using over 95% cpu having no DB session or DB session for > 2hrs
00,30 * * * * /home/applmgr/forms_runaway.sh 2>&1
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set head off
set verify off
set feedback off
set pagesize 0
define form_client_PID = &1
select count(*) from v$session s , v$process p, FND_FORM_SESSIONS_V f where S.AUDSID=f.audsid and p.addr=s.paddr and s.process='&form_client_PID';
3. Actual shell script is /home/applmgr/forms_runaway.sh and looks like;
# Author : Amandeep Singh
# Description : Kills runaway form processes using more than 95% cpu
# and Form Session with no DB session or DB session > 2hrs
# Dated : 11-April-2012
#!/bin/bash
. /home/applmgr/.bash_profile
PWD=`cat ~/.pwd`
export PWD
echo "`date`">/tmp/runaway_forms.log
echo "----------------------------------">>/tmp/runaway_forms.log
VAR1=`top -b -u applmgr -n 1|grep f60webmx|grep -v sh|grep -v awk|grep -v top|sort -nrk9|head -2|sed 's/^[ \t]*//;s/[ \t]*$//'| awk '{ if ($9 > 95 && $12 = "f60webmx") print $1 " "$9 " "$11 " "$12; }'`
PID1=`echo $VAR1|awk '{print $1}'`
CPU1=`echo $VAR1|awk '{print $2}'`
TIME1=`echo $VAR1|awk '{print $3}'`
PROG1=`echo $VAR1|awk '{print $4}'`
PID_1=`echo $VAR1|awk '{print $5}'`
CPU_1=`echo $VAR1|awk '{print $6}'`
TIME_1=`echo $VAR1|awk '{print $7}'`
PROG_1=`echo $VAR1|awk '{print $8}'`
echo "PID1="$PID1", CPU%="$CPU1", Running Time="$TIME1", Program="$PROG1>>/tmp/runaway_forms.log
echo "PID_1="$PID_1", CPU%="$CPU_1", Running Time="$TIME_1", Program="$PROG_1>>/tmp/runaway_forms.log
echo " ">>/tmp/runaway_forms.log
sleep 120
echo "`date`">>/tmp/runaway_forms.log
echo "----------------------------------">>/tmp/runaway_forms.log
VAR2=`top -b -u applmgr -n 1|grep f60webmx|grep -v sh|grep -v awk|grep -v top|sort -nrk9|head -2|sed 's/^[ \t]*//;s/[ \t]*$//'| awk '{ if ($9 > 95 && $12 = "f60webmx") print $1 " "$9 " "$11 " "$12; }'`
PID2=`echo $VAR2|awk '{print $1}'`
CPU2=`echo $VAR2|awk '{print $2}'`
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CPU_2=`echo $VAR2|awk '{print $6}'`
TIME_2=`echo $VAR2|awk '{print $7}'`
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echo " ">>/tmp/runaway_forms.log
# If PID1 or PID2 is NULL
if [ -z ${PID1} ] || [ -z ${PID2} ]
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[ ${PID1} -eq ${PID2} ] || [ ${PID1} -eq ${PID_2} ] || [ ${PID_1} -eq ${PID2} ] || [ ${PID_1} -eq ${PID_2} ];
then
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EOF`
echo " ">>/tmp/runaway_forms.log
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# if no DB session found for PID
if [ $DB_SESSION -eq 0 ] then
echo " ">>/tmp/runaway_forms.log
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echo "-------------------------------------------------------------------">>/tmp/runaway_forms.log
echo "PID="$PID1", CPU%="$CPU1", Running Time="$TIME1", Program="$PROG1>>/tmp/runaway_forms.log
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#Email the output
mailx -s "Killed: `hostname -a` Runaway Form Processes" [email protected] </tmp/runaway_forms.log
cat /tmp/runaway_forms.log
else
# If DB session exists for PID
if [ ${exprHRS} -gt 120 ]; then
echo $DB_SESSION "of Database sessions exist for this forms process-PID="$PID1". But its running for more than 2 hours. ">>/tmp/runaway_forms.log
echo "Process running time is "$exprHRS" minutes.">>/tmp/runaway_forms.log
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echo "-------------------------------------------------------------------">>/tmp/runaway_forms.log
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#Email the output
mailx -s "`hostname -a`: Runaway Form Processes" [email protected] </tmp/runaway_forms.log
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echo "Process running time is "$exprHRS" minutes.">>/tmp/runaway_forms.log
echo $DB_SESSION "of Database sessions exist for PID="$PID1" and is less than 2 hours old. Not killing...">>/tmp/runaway_forms.log
echo "For more details on this PID, run following SQL query;">>/tmp/runaway_forms.log
echo "-----------------------------------------------------------------------">>/tmp/runaway_forms.log
echo "set pages 9999 lines 150">>/tmp/runaway_forms.log
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mailx -s "`hostname -a`: Runaway Form Processes" [email protected] </tmp/runaway_forms.log
cat /tmp/runaway_forms.log
fi
fi
else
#if PID1 and PID2 are not equal or CPU% is less than 95%.
echo "No unique CPU hogging form processes found. Exiting...">>/tmp/runaway_forms.log
cat /tmp/runaway_forms.log
fi
If you have the same problem with some other unix and DB processes, the script can be easily modified and used.
But use this with thorough testing first (by commenting out <kill -9 $PID1> lines.
Good luck.
Edited by: R12_AppsDBA on 19/04/2012 13:10

Thanks for sharing the script!
Hussein

Swap space usage in solaris 2.6

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Arch process using more swap space

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