Re: WAL file accumulation on log shipping primary node

Dong,

How are you copying the wal logs over to the secondary ? Since this is
loosely coupled I am wondering how the master would be effected by
load.

Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca



On Tue, Dec 13, 2011 at 12:42 AM, Dong Han <dhan@bluecatnetworks.com> wrote:
> Dear all,
>
>
>
> We have setup log shipping replication between primary node and 2 secondary
> nodes with Postgresql version 8.4.8.  From the data replication points of
> view, everything is fine. However, under heavy data modification load - we
> have an extremely busy system, we saw WAL files keep accumulating on the
> primary node - new WAL files are copied to secondary node and restored
> properly, but the primary node keeps holding a large number of old WAL
> files. To the end, the WAL files fill up the database partition. Previously,
> we tested in a lighter load environment, we did not have similar problem.
>
>
>
> Please help to diagnosis the problem, and give me recommendations on how to
>  fix this problem.
>
>
>
> Thank you very much.
>
>
>
> Dong Han
>
>
>
>