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Re: High RAM usage on postgres

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Am 17.03.2013 09:31, schrieb Scott Marlowe:
On Thu, Mar 14, 2013 at 12:55 PM, prashantmalik
<prashantmalikk@xxxxxxxxx> wrote:

*Query :* "SELECT * FROM customer"
-----------------------------------------------------------------------------------------------------------------------------------------------------------
top

top - 00:14:38 up 44 days, 12:06,  2 users,  load average: 3.57, 1.34, 0.69
Tasks: 243 total,   3 running, 240 sleeping,   0 stopped,   0 zombie
Cpu(s):  6.5%us,  0.6%sy,  0.0%ni, 92.5%id,  0.4%wa,  0.0%hi,  0.0%si,
0.0%st
Mem:  32949816k total, 31333260k used,  1616556k free,   526988k buffers
Swap:  4192956k total,  1989136k used,  2203820k free,  9182092k cached

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
12671 root      25   0 19.8g  19g 1612 R 100.1 62.6   4:31.78 psql

What eats up your memory is "psql", which indeed allocates a whopping 19G physical memory, not the server process. - Are you sure that is _your_ "psql" selecting "* from customers" and not somebody else's, doing a cross-join? - Is there potentially anything that gets TOASTed in your "customer" table? I'm not sure if that would show up in pg_relation_size and friends, but it would get sent to psql of course.

Regards,

--
Gunnar "Nick" Bluth
RHCE/SCLA

Mobil   +49 172 8853339
Email: gunnar.bluth@xxxxxxxxxxx
__________________________________________________________________________
In 1984 mainstream users were choosing VMS over UNIX.  Ten years later
they are choosing Windows over UNIX.  What part of that message aren't you
getting? - Tom Payne



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