Re: postgresql 9.1 out of memory

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Евгений Селявка <evg.selyavka@xxxxxxxxx> wrote:

> Server HW:

> 32GB RAM

> Before server crash i have this parameters in config:
>
> max_connections = 350

> work_mem = 2GB

> After crash  i change this parameters:

> work_mem = 1GB

A good "rule of thumb" is to allow for one work_mem allocation per
connection for a reasonable estimation of peak memory usage for
this purpose.  (This may need to be adjusted based on workload, but
it's a reasonable place to start.)  So you have adjusted likely
peaks down from 700GB to 350GB.

I usually start with work_mem set to RAM * 25% / max_connections.
In your case that works out to 23MB.  If you are able to use a
connection pooler to reducee max_connections, that will allow you
to boost work_mem.

-- 
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


-- 
Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-admin





[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux