Re: Setting Shared-Buffers

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

 



Thnks for the replyies.

It's a slony slave db, for reporting.

So, what's a good value to set to effective_cache_size with 10 Gb RAM?

On Thu, Jul 9, 2009 at 9:05 PM, Scott Mead <scott.lists@xxxxxxxxxxxxxxxx> wrote:

On Thu, Jul 9, 2009 at 6:18 PM, Rafael Domiciano <rafael.domiciano@xxxxxxxxx> wrote:
Hello People,

Today, I've upgraded a dedicated postgres server, from 2 Gb to 10 Gb. Everything gone well.

But, I would like shared buffers to use at least 5 Gb of the total memory.

   What's your workload?  Is this db primarily for reporting or OLTP?

    If you have an OLTP style workload, I wouldn't recommend going much over 2.5 - 4 GB (depending on your specific workload).  Just set your 'effective_cache_size' higher.  This tells postgres how much memory that the OS has for caching and the database will perform better.
Linux Fedora Core 9
postgres=# select version();
                                              version
---------------------------------------------------------------------------------------------------
 PostgreSQL 8.3.5 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8)
(1 row)

  32 bit pg can't address that much memory.  You'd need to recompile or download the 64 bit packages.  I believe you'd need to dump / reload as well, but I may be off about that one.


--Scott



[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