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High CPU for inactive session [message #571234] Thu, 22 November 2012 06:01 Go to next message
sathik
Messages: 196
Registered: August 2009
Location: INDIA
Senior Member
when I was analyzing high CPU utilization issue, I saw that the most of the top PID's were INACTIVE in database. But it was utilizing more than 4% CPU. how it is utilizing CPU without doing any work in database?


   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP
 24013 oracle   2167M 1581M sleep   53    0   0:01:53  20% oracle/1
 13260 oracle   2167M 1580M sleep   30    0   0:01:16  14% oracle/1
 24399 oracle   2167M 1582M sleep   59    0   0:03:01 4.2% oracle/1
 11509 oracle   2178M 1593M sleep   59    0   0:02:10 2.8% oracle/11
 16216 oracle   1040K  832K sleep   16    2   0:00:00 1.2% find/1
 12276 oracle   2166M 1579M sleep   59    0   0:00:29 0.9% oracle/1
 24227 oracle   2167M 1582M sleep   59    0   0:02:16 0.6% oracle/1
 24011 oracle   2169M 1583M sleep   59    0   0:02:28 0.6% oracle/1
 10876 oracle   2167M 1581M sleep   59    0   0:02:57 0.4% oracle/1
 28703 oracle   2169M 1583M sleep   59    0   0:02:16 0.3% oracle/11
 16067 oracle   2135M 1563M sleep   59    0   0:00:04 0.3% oracle/1
  2880 root       14M 5504K sleep   59    0   4:30:10 0.3% scopeux/1
   921 root       57M   16M sleep   29   10  30:46:59 0.2% java/12
 24628 oracle   2167M 1581M sleep   59    0   0:02:08 0.2% oracle/1
 12866 nettrap0 4840K 4640K cpu0    59    0   0:00:05 0.2% prstat/1
 16136 oracle   1912K 1456K sleep   53    2   0:00:00 0.1% lpmon_flag_mana/1
 17160 oracle   2139M 1553M sleep   59    0   3:55:20 0.1% oracle/11
  7587 oracle    169M   79M sleep   59    0  13:24:23 0.1% emagent/17
 15461 oracle     45M   17M sleep   59    0   0:04:33 0.1% httpd/5
  2910 root     1064K  696K sleep   59    0   0:39:55 0.1% perf64/1
   679 root     3792K 2384K sleep   59    0   4:14:00 0.1% nscd/21
   590 root     2344K 1176K sleep   59    0   1:33:39 0.0% rpcbind/1
  8178 root       25M 6592K sleep   59    0   4:37:54 0.0% discusge/1
 15798 oracle   2166M 1578M sleep   59    0   0:00:11 0.0% oracle/1
 15552 oracle     45M   17M sleep   59    0   0:04:22 0.0% httpd/5
 15468 oracle     45M   17M sleep   59    0   0:04:28 0.0% httpd/5
 11313 root     4568K 2872K sleep   59    0   0:00:01 0.0% sshd/1
 17155 oracle   2141M 1557M sleep   59    0   5:13:08 0.0% oracle/258
   143 root     4048K 2608K sleep   59    0   0:08:03 0.0% picld/6
  8161 root      246M   37M sleep   59    0   0:11:35 0.0% java/29
 15557 oracle     45M   17M sleep   59    0   0:04:23 0.0% httpd/5
 17136 oracle   2134M 1555M sleep   59    0   0:03:07 0.0% oracle/1
 16135 oracle   1096K  888K sleep   53    2   0:00:00 0.0% sh/1
 16939 oracle    111M   21M sleep   59    0   1:05:16 0.0% java/19
 16906 oracle     17M 3688K sleep   59    0   2:39:17 0.0% opmn/19
 27976 oracle   2174M 1588M sleep   59    0   0:02:15 0.0% oracle/11
     1 root     1288K  624K sleep   59    0   0:48:35 0.0% init/1
  7586 oracle   6688K 2840K sleep   59    0   0:59:40 0.0% perl/1
 21752 oracle   2176M 1591M sleep   59    0   0:03:52 0.0% oracle/11
 NPROC USERNAME  SIZE   RSS MEMORY      TIME  CPU
   101 oracle    107G   77G   100%  39:30:23  45%
    56 root      768M  150M   0.2%  78:36:54 0.8%
     2 nettrap0 6736K 6080K   0.0%   0:00:05 0.2%
     3 hpqw       19M   11M   0.0%   0:00:00 0.0%
     1 par123    336K    8K   0.0%   0:00:00 0.0%
     2 kdps     3000K 2232K   0.0%   0:01:47 0.0%
     1 daemon   3200K 1440K   0.0%   0:00:28 0.0%


       SID    SERIAL# PROCESS      PROGRAM                                          STATUS   SPID      SQL_HASH_VALUE LAST_CALL_ET
---------- ---------- ------------ ------------------------------------------------ -------- ------------ -------------- ------------
       305      18474 15550        httpd@poswart1 (TNS V1-V3)                      INACTIVE  24013             0            6


       SID    SERIAL# PROCESS      PROGRAM                                          STATUS   SPID      SQL_HASH_VALUE LAST_CALL_ET
---------- ---------- ------------ ------------------------------------------------ -------- ------------ -------------- ------------
       189      18916 15471        httpd@dys339d001 (TNS V1-V3)                     INACTIVE 13260             0           11


       SID    SERIAL# PROCESS      PROGRAM                                          STATUS   SPID      SQL_HASH_VALUE LAST_CALL_ET
---------- ---------- ------------ ------------------------------------------------ -------- ------------ -------------- ------------
       267      59933 15549        httpd@dys339d001 (TNS V1-V3)                     INACTIVE 24399             0            9
Re: High CPU for inactive session [message #571455 is a reply to message #571234] Mon, 26 November 2012 02:51 Go to previous messageGo to next message
tony123
Messages: 9
Registered: August 2012
Junior Member

check v$session_wait.event
Re: High CPU for inactive session [message #571965 is a reply to message #571455] Tue, 04 December 2012 23:35 Go to previous messageGo to next message
mano9
Messages: 1
Registered: December 2012
Location: Bangalore
Junior Member
Smile

Hi Could any one help me...I want to run a job on oracle db's which kills all inactive jobs and mails the report to respective recipients....
Re: High CPU for inactive session [message #571966 is a reply to message #571965] Tue, 04 December 2012 23:39 Go to previous message
BlackSwan
Messages: 23146
Registered: January 2009
Senior Member
>Could any one help me...I want to run a job on oracle db's which kills all inactive jobs and mails the report to respective recipients....
most sessions are INACTIVE most of the time.
blindly terminating INACTIVE sessions is a great way to ABORT the whole database!

post SQL & results that show candidate sessions.
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