Re: Check Pointer

On Thu, Jun 6, 2013 at 1:44 AM, itishree sukla <itishree(dot)sukla(at)gmail(dot)com>wrote:

> Can any one give more input, you can see my top out put, in %MEM its
> taking 24.1.
>
>
> On Thu, May 30, 2013 at 6:15 PM, itishree sukla <itishree(dot)sukla(at)gmail(dot)com>wrote:
>
>> Thanks for the quick response. Below is the out put of Top Commnd.
>>
>> 3971 postgres 20 0 8048m 303m 301m S 0 0.9 0:04.34
>> /usr/lib/postgresql/9.2/bin/postgres -D /var/lib/postgresql/9.2/main -c
>> config_file=/etc/postgre
>> 3972 postgres 20 0 66828 1820 708 S 0 0.0 1:36.37 postgres:
>> logger
>> process
>>
>> 3974 postgres 20 0 8054m 7.6g 7.6g S 0 24.1 0:56.59 postgres:
>> checkpointer
>> process
>> 3975 postgres 20 0 8051m 895m 891m S 0 2.8 0:04.98 postgres:
>> writer
>> process
>>
>> 3976 postgres 20 0 8051m 9m 9072 S 0 0.0 0:35.17 postgres:
>> wal writer
>> process
>> 3977 postgres 20 0 70932 3352 716 S 0 0.0 0:05.19 postgres:
>> stats collector
>> process
>> 1
>>
>> Postgresql =9.2.3
>>
>>
>>
>> On Thu, May 30, 2013 at 5:56 PM, Heikki Linnakangas <
>> hlinnakangas(at)vmware(dot)com> wrote:
>>
>>> On 30.05.2013 15:09, itishree sukla wrote:
>>>
>>>> In our server Check pointer process is consuming 8 GB of memory, what
>>>> could
>>>> be the possible reason? Can any one please help.
>>>>
>>>
>>> Are you sure you're measuring the memory correctly? The RES field in top
>>> output, for example, includes shared memory, ie. the whole buffer cache.
>>> Shared memory isn't really "consumed" by the checkpointer process, but
>>> shared by all postgres processes.
>>>
>>> - Heikki
>>>
>>
>>
>
As said before, the memory you may be not the real memory consumed by
checkpointer process, but it includes the shared memory (which is,
basically, used by all postgres' processes).
Depesz wrote a nice topic on his blog about this subject [1], read it and
try the commands to see the real memory usage by checkpointer (when I say
"real", I mean "private").

[1] http://www.depesz.com/2012/06/09/how-much-ram-is-postgresql-using/

Regards,
--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres