Isolating and Killing Runaway Processes

How does one go about isolating and kiling a runaway PL/SQL process? I decided that it would be fun to call a
procedure within a package that had an improperly coded loop, coded by yours truly. I called they package and
then noticed that it seemed to be taking too long. Upon reviewing the code, I noticed that I my program was
now stuck in an infinite loop. Since this process had run off on its own, I tried to complie it to fix the problem and
much to my dismay I could not even complie the code, even though I was able to read the source to my screen.
Where can one look to gleen some information as to how to kill the instance of the demon child without having to do
what my DBA did and restart out database instance? Any v$ views etc?

If you are in sqlplus when it locks up, you can simply enter <control> c
that should kill the process. If you close your sqlplus session in any other way than standard exit procedures, depending on your setup, you either wait for pmon to find the defunct process or the administrator has to kill it for you.

Similar Messages

  • Finding and killing runaways in Oracle

    I am very new to the DBA side of Oracle.
    I have several "Power Users" that are constantly kicking off outrageous queries without joins and then just killing their telnet sessions and reconnecting to correct the mistake and then complaining about performance. I think that this is leaving the query running in the background.
    Since neither removing their keyboards nor removing their fingers are options is there any way to check out resources and who is running what in the database and kill/or any runaway processes or queries?
    Any help would be appreciated,
    Chris S.

    The problem with resource limits is that you prevent ligitimate large queries.
    So the problem becomes identifying the large queries that cause the problems.
    I am currently looking at statistics so I do not have all the answers yet. One place to start looking for the sinners is v$session, v$sesstat and v$statname(?).
    Run this query every 5 minutes check the large queries and users with many queries. Users with more than one session are the ones you would be interested in. This is not perfect, but it is a start.
    If you are on Unix you can set this up in Crontab and create a shell script that checks for specifics in the result and send you an email.
    One thing I have found to cause big problems is when we use "default" for parallelism, one user can pretty much kill the server that way, if accessing a large table spanning many files I have seen up to 30 parallel queries running at once. If all the parallel processes are busy everybody else will be running non-parallel.

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    *https://support.mozilla.com/kb/Firefox+hangs

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  • The plug in container for Adobe Flash eats up 100% of my CPU on a regular basis and I have to go in to task manager and kill the process.

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  • How to kill Forms Runaway Process using 95% CPU and running for 2 hours.

    We had a situation at E-Business Suite customer (using Oracle VM server) where some of Form processes were not being cleared by form timeout settings automatically.
    Also when user exits the form session from front end, the linux form process (PID) and DB session did not exit properly, so they got hung.
    They were spiking CPU and memory usage and causing e-business suite to perform slowely and ultimately causing VM host to reboot the production VM guest (running on Linux).
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    •     Shell script runs and tries to find "top two" f60webmx processes (form sessions) using over 95% cpu with 2 minutes interval.
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    •     If top process is found, it searches for its DB session using apps login (with hidden apps password file - /home/applmgr/.pwd).
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    b.     If DB session is found, it waits for 2 hours so that form process times automatically via form session timeout setting.
    It also emails the SQL to check the DB session for that form process.
    c.     If DB session is found and it does not timeout after 2 hours,
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    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
    2. SQL that this script calls is /home/applmgr/frm_runaway.sql and looks like;
    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}'`
    TIME2=`echo $VAR2|awk '{print $3}'`
    PROG2=`echo $VAR2|awk '{print $4}'`
    PID_2=`echo $VAR2|awk '{print $5}'`
    CPU_2=`echo $VAR2|awk '{print $6}'`
    TIME_2=`echo $VAR2|awk '{print $7}'`
    PROG_2=`echo $VAR2|awk '{print $8}'`
    HRS=`echo $TIME1|cut -d: -f1`
    exprHRS=`expr "$HRS"`
    echo "PID2="$PID2", CPU%="$CPU2", Running Time="$TIME2", Program="$PROG2>>/tmp/runaway_forms.log
    echo "PID_2="$PID_2", CPU%="$CPU_2", Running Time="$TIME_2", Program="$PROG_2>>/tmp/runaway_forms.log
    echo " ">>/tmp/runaway_forms.log
    # If PID1 or PID2 is NULL
    if [ -z ${PID1} ] || [ -z ${PID2} ]
    then
    echo "no top processes found. Either PID is NULL OR CPU% is less than 95%. Exiting...">>/tmp/runaway_forms.log
    elif
    # If PID1 is equal to PID2 or PID1=PID_2 or PID_1=PID2 or PID_1=PID_2
    [ ${PID1} -eq ${PID2} ] || [ ${PID1} -eq ${PID_2} ] || [ ${PID_1} -eq ${PID2} ] || [ ${PID_1} -eq ${PID_2} ];
    then
    DB_SESSION=`$ORACLE_HOME/bin/sqlplus -S apps/$PWD @/home/applmgr/frm_runaway.sql $PID1 << EOF
    EOF`
    echo " ">>/tmp/runaway_forms.log
    echo "DB_SESSION ="$DB_SESSION >>/tmp/runaway_forms.log
    # if no DB session found for PID
    if [ $DB_SESSION -eq 0 ] then
    echo " ">>/tmp/runaway_forms.log
    echo "Killed Following Runaway Forms Process:">>/tmp/runaway_forms.log
    echo "-------------------------------------------------------------------">>/tmp/runaway_forms.log
    echo "PID="$PID1", CPU%="$CPU1", Running Time="$TIME1", Program="$PROG1>>/tmp/runaway_forms.log
    kill -9 $PID1
    #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 "$exprHRS" minutes.">>/tmp/runaway_forms.log
    echo "Killed Following Runaway Forms Process:">>/tmp/runaway_forms.log
    echo "-------------------------------------------------------------------">>/tmp/runaway_forms.log
    echo "PID="$PID1", CPU%="$CPU1", Running Time="$TIME1", Program="$PROG1>>/tmp/runaway_forms.log
    kill -9 $PID1
    #Email the output
    mailx -s "`hostname -a`: Runaway Form Processes" [email protected] </tmp/runaway_forms.log
    cat /tmp/runaway_forms.log
    else
    echo "Process running time is "$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
    echo "select f.user_form_name, f.user_name, p.spid DB_OS_ID , s.process client_os_id,, s.audsid, f.PROCESS_SPID Forms_SPID,">>/tmp/runaway_forms.log
    echo "to_char(s.logon_time,'DD-Mon-YY hh:mi:ss'), s.seconds_in_wait">>/tmp/runaway_forms.log
    echo "from v\$session s , v\$process p, FND_FORM_SESSIONS_V f">>/tmp/runaway_forms.log
    echo "where S.AUDSID=f.audsid and p.addr=s.paddr and s.process='"$PID1"' order by p.spid;">>/tmp/runaway_forms.log
    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

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