Re: Heavy postgres process

On Tue, Sep 16, 2008 at 1:41 AM, Vivek_Sharan <Vivek_Sharan@infosys.com> 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
havealready scanned pg_stat_activity and pg_listener table but could get any clue. Pg_stat_activity shows list of all
idleprocesses 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
anythingbecause this is not available with top on this server. Following is the output of top if filtered for only
postgresuser 
>
> *****************************************************************************
> 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@gmail.com]
> Sent: Monday, September 15, 2008 9:24 PM
> To: Vivek_Sharan
> Cc: pgsql-admin@postgresql.org
> 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@infosys.com> 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
ofmemory quickly. 
>>
>> Regards,
>> ~Vivek
>>
>>
>> -----Original Message-----
>> From: Scott Marlowe [mailto:scott.marlowe@gmail.com]
>> Sent: Friday, September 12, 2008 11:18 PM
>> To: Vivek_Sharan
>> Cc: pgsql-admin@postgresql.org
>> Subject: Re: [ADMIN] Heavy postgres process
>>
>> On Fri, Sep 12, 2008 at 2:12 AM, Vivek_Sharan <Vivek_Sharan@infosys.com> 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.
>>
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Vivek, which version of postgres you are using?

gb.-

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