| From: | Devrim GÜNDÜZ <devrim(at)gunduz(dot)org> |
|---|---|
| To: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | Michael Best <mbest(at)pendragon(dot)org>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: 9.0 Streaming Replication Problem to two slaves |
| Date: | 2011-08-02 18:05:47 |
| Message-ID: | 1312308347.2538.56.camel@lenovo01-laptop03.gunduz.org |
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| Lists: | pgsql-general |
On Tue, 2011-08-02 at 11:55 -0600, Scott Marlowe wrote:
> > Is this likely that the disks are too slow on the replication
> > servers, or is something else happening, such as the restoration of
> logs is considerably slower than on the primary?
>
> Could be. Are the drives on the slaves much slower? I'd imagine a
> slave with the same drive setup would be able to keep up.
We have a customer who generates 150+ xlogs per minute under daily load,
and our first HS installation failed just because of :
* Network was slow (10 Mbit), so could not keep up with WAL files.
* Disks were also slow on slave.
So yeah, that could be it.
Regards,
--
Devrim GÜNDÜZ
Principal Systems Engineer @ EnterpriseDB: http://www.enterprisedb.com
PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer
Community: devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr
http://www.gunduz.org Twitter: http://twitter.com/devrimgunduz
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