I'm using postgres 7.4.5 Regards, Vivek -----Original Message----- From: Guido Barosio [mailto:gbarosio@xxxxxxxxx] Sent: Tuesday, September 16, 2008 8:08 PM To: Vivek_Sharan Cc: Scott Marlowe; pgsql-admin@xxxxxxxxxxxxxx Subject: Re: [ADMIN] Heavy postgres process On Tue, Sep 16, 2008 at 1:41 AM, Vivek_Sharan <Vivek_Sharan@xxxxxxxxxxx> wrote: > Thanks for the information so far > My Application runs on FreeBSd box and main technological component are Apache and mod Perl, database is postgres. I have already scanned pg_stat_activity and pg_listener table but could get any clue. Pg_stat_activity shows list of all idle processes but command (current_query) column is empty. So I cannot make out what these processes are doing. > TOP on this server doesn't have any option available to further break down processes. And hitting 'M; did change anything because this is not available with top on this server. Following is the output of top if filtered for only postgres user > > ***************************************************************************** > last pid: 92308; load averages: 0.00, 0.03, 0.05 > 78 processes: 2 running, 76 sleeping > CPU states: 1.6% user, 0.0% nice, 3.4% system, 0.0% interrupt, 94.9% idle > Mem: 413M Active, 2122M Inact, 534M Wired, 140M Cache, 199M Buf, 533M Free > Swap: 4096M Total, 3880K Used, 4092M Free > > PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND > 90976 postgres 2 0 83568K 76016K sbwait 2 0:32 2.83% 2.83% postgres > 90963 postgres 2 0 83396K 75876K sbwait 2 0:25 1.37% 1.37% postgres > 90919 postgres 2 0 83808K 76244K sbwait 1 0:32 0.39% 0.39% postgres > 87341 postgres 2 0 6388K 756K select 3 2:35 0.00% 0.00% postgres > 87340 postgres 2 0 7200K 1224K select 0 1:41 0.00% 0.00% postgres > 90961 postgres 2 0 83580K 76008K sbwait 0 0:30 0.00% 0.00% postgres > 90920 postgres 2 0 83636K 76068K sbwait 0 0:29 0.00% 0.00% postgres > 90934 postgres 2 0 83664K 76012K sbwait 0 0:27 0.00% 0.00% postgres > 90924 postgres 2 0 83408K 75872K sbwait 0 0:25 0.00% 0.00% postgres > 90915 postgres 2 0 79292K 72664K sbwait 0 0:23 0.00% 0.00% postgres > 90955 postgres 2 0 79644K 73040K sbwait 0 0:22 0.00% 0.00% postgres > 90979 postgres 2 0 78904K 72260K sbwait 0 0:17 0.00% 0.00% postgres > 87339 postgres 2 0 74756K 672K select 1 0:12 0.00% 0.00% postgres > 90921 postgres 2 0 75504K 59848K sbwait 3 0:01 0.00% 0.00% postgres > 90927 postgres 2 0 75540K 59296K sbwait 3 0:01 0.00% 0.00% postgres > 90962 postgres 2 0 75524K 56960K sbwait 0 0:01 0.00% 0.00% postgres > 90923 postgres 2 0 75540K 57584K sbwait 1 0:01 0.00% 0.00% postgres > 90914 postgres 2 0 75552K 57776K sbwait 1 0:01 0.00% 0.00% postgres > 90917 postgres 2 0 75524K 57256K sbwait 3 0:01 0.00% 0.00% postgres > 90922 postgres 2 0 75504K 57352K sbwait 1 0:01 0.00% 0.00% postgres > 90918 postgres 2 0 75508K 57748K sbwait 3 0:01 0.00% 0.00% postgres > 90933 postgres 2 0 75540K 53728K sbwait 2 0:01 0.00% 0.00% postgres > 90926 postgres 2 0 75484K 54928K sbwait 3 0:01 0.00% 0.00% postgres > 90931 postgres 2 0 75512K 20880K sbwait 3 0:00 0.00% 0.00% postgres > 90977 postgres 2 0 75512K 20584K sbwait 0 0:00 0.00% 0.00% postgres > 91005 postgres 2 0 75512K 19956K sbwait 0 0:00 0.00% 0.00% postgres > 90966 postgres 2 0 75488K 19056K sbwait 1 0:00 0.00% 0.00% postgres > 90986 postgres 2 0 75512K 19348K sbwait 1 0:00 0.00% 0.00% postgres > 90973 postgres 2 0 75512K 18140K sbwait 1 0:00 0.00% 0.00% postgres > 90989 postgres 2 0 75512K 18668K sbwait 2 0:00 0.00% 0.00% postgres > 90956 postgres 2 0 75488K 18320K sbwait 2 0:00 0.00% 0.00% postgres > 90998 postgres 2 0 75512K 17564K sbwait 3 0:00 0.00% 0.00% postgres > 90925 postgres 2 0 75488K 17412K sbwait 1 0:00 0.00% 0.00% postgres > 88881 postgres 2 0 75528K 7920K sbwait 0 0:00 0.00% 0.00% postgres > ***************************************************************************** > > Output of vmstat command > > procs memory page disks faults cpu > r b w avm fre flt re pi po fr sr da0 da1 in sy cs us sy id > 0 0 0 423492 688492 40 0 0 0 52 57 0 0 50 11 50 53 47 -0 > > ***************************************************************************** > Output of systat command > >> systat > > > /0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10 > Load Average | > > /0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100 > postgres postgres X > ***************************************************************************** > entries in pg_stat_activities > > datid | datname | procpid | usesysid | usename | current_query | query_start > -------+---------+---------+----------+----------+---------------+------------- > 17142 | wasdb | 90914 | 103 | was | | > 17142 | wasdb | 90917 | 103 | was | | > 17142 | wasdb | 90915 | 103 | was | | > 17142 | wasdb | 90918 | 103 | was | | > 17142 | wasdb | 90919 | 103 | was | | > 17142 | wasdb | 90920 | 103 | was | | > 17142 | wasdb | 90921 | 103 | was | | > 17142 | wasdb | 90922 | 103 | was | | > 17142 | wasdb | 90923 | 103 | was | | > 17142 | wasdb | 90924 | 103 | was | | > 17142 | wasdb | 90925 | 104 | audit | | > 17142 | wasdb | 90926 | 103 | was | | > 17142 | wasdb | 90927 | 103 | was | | > 17142 | wasdb | 90955 | 103 | was | | > 17142 | wasdb | 90956 | 104 | audit | | > 17142 | wasdb | 90961 | 103 | was | | > 17142 | wasdb | 90931 | 104 | audit | | > 17142 | wasdb | 90933 | 103 | was | | > 17142 | wasdb | 90934 | 103 | was | | > 17142 | wasdb | 90962 | 103 | was | | > 17142 | wasdb | 90963 | 103 | was | | > 17142 | wasdb | 90966 | 104 | audit | | > 17142 | wasdb | 90973 | 104 | audit | | > 17142 | wasdb | 90976 | 103 | was | | > 17142 | wasdb | 90977 | 104 | audit | | > 17142 | wasdb | 90979 | 103 | was | | > 17142 | wasdb | 90986 | 104 | audit | | > 17142 | wasdb | 90989 | 104 | audit | | > 17142 | wasdb | 92353 | 1 | postgres | | > 17142 | wasdb | 90998 | 104 | audit | | > 17142 | wasdb | 88881 | 1 | postgres | | > 17142 | wasdb | 91005 | 104 | audit | | > (32 rows) > > ***************************************************************************** > Regards, > Vivek Sharan > > > > -----Original Message----- > From: Scott Marlowe [mailto:scott.marlowe@xxxxxxxxx] > Sent: Monday, September 15, 2008 9:24 PM > To: Vivek_Sharan > Cc: pgsql-admin@xxxxxxxxxxxxxx > Subject: Re: [ADMIN] Heavy postgres process > > Run top, hit M and the attach the output to a reply here and we'll take a look. > > On Mon, Sep 15, 2008 at 5:33 AM, Vivek_Sharan <Vivek_Sharan@xxxxxxxxxxx> wrote: >> Thanks for your reply but how would I calculate which processes are eating up more memory, When I check process list, its only postgres and apache processes running on my system and only postgres processes are heavy. System runs out of memory quickly. >> >> Regards, >> ~Vivek >> >> >> -----Original Message----- >> From: Scott Marlowe [mailto:scott.marlowe@xxxxxxxxx] >> Sent: Friday, September 12, 2008 11:18 PM >> To: Vivek_Sharan >> Cc: pgsql-admin@xxxxxxxxxxxxxx >> Subject: Re: [ADMIN] Heavy postgres process >> >> On Fri, Sep 12, 2008 at 2:12 AM, Vivek_Sharan <Vivek_Sharan@xxxxxxxxxxx> wrote: >>> Hi Admin, >>> >>> I'm new to this I have few queries as listed below >>> >>> 1) Number of connections made with a particular database. >> >> Wait, how to find out how many connections there are, or how many can >> a particular db handle. >> >> For this kind of thing, look at the admin functions in the pgsql-sql docs: >> >> http://www.postgresql.org/docs/8.3/interactive/functions-admin.html >> >> specifically you want something like: >> >> select datname from pg_stat_activity; >> select datname, count(datname) from pg_stat_activity group by datname; >> >>> 2) And how can I check which process (PID) is responsible for the >>> connection and >> >> That table up there ^^^ >> >>> 3) what all can make a postgres process as heavy as 70-80 MB in size >> >> you may not be measuring properly. When you say it's using 70-80 MB >> how do you know this? The numbers you see in top aren't necessarily >> what some folks think they ar. >> >> **************** CAUTION - Disclaimer ***************** >> This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely >> for the use of the addressee(s). If you are not the intended recipient, please >> notify the sender by e-mail and delete the original message. Further, you are not >> to copy, disclose, or distribute this e-mail or its contents to any other person and >> any such actions are unlawful. This e-mail may contain viruses. Infosys has taken >> every reasonable precaution to minimize this risk, but is not liable for any damage >> you may sustain as a result of any virus in this e-mail. You should carry out your >> own virus checks before opening the e-mail or attachment. Infosys reserves the >> right to monitor and review the content of all messages sent to or from this e-mail >> address. Messages sent to or from this e-mail address may be stored on the >> Infosys e-mail system. >> ***INFOSYS******** End of Disclaimer ********INFOSYS*** >> > > -- > Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-admin > Vivek, which version of postgres you are using? gb.- -- http://www.linkedin.com/in/gbarosio
