Re: [ADMIN] High Availability: Hot Standby vs. Warm Standby

2010-07-12 Thread Greg Smith
Brad Nicholson wrote: One further thing to mention - all of these solutions are based on making the physical blocks available (actually, I'm not sure about Streaming replication in 9.0). You're right here; the SR feature in 9.0 is essentially near real-time partial WAL file shipping, and the W

Re: [ADMIN] High Availability: Hot Standby vs. Warm Standby

2010-07-12 Thread Greg Smith
Thomas Kellerer wrote: The manual lists three possible solutions to HA: shared disk failover, file system replication and Warm/Hot Standby. I'm not an admin (nor a DBA), so my question might sound a bit stupid: from my point of view solutions using shared disk failover of file system replicatio

Re: [ADMIN] Postgresql shared_buffer and SHMMAX configuration

2010-07-12 Thread Kevin Grittner
"Gnanakumar" wrote: > We have our java servlet code running in Tomcat and the connection > is managed by pgpool. If you're running under Tomcat, you might not even need pgpool; see this recent post: http://archives.postgresql.org/pgsql-performance/2010-07/msg00154.php > When we did a Load

Re: [ADMIN] High Availability: Hot Standby vs. Warm Standby

2010-07-12 Thread Brad Nicholson
On Mon, 2010-07-12 at 08:58 +0200, Thomas Kellerer wrote: > Greg Smith, 10.07.2010 14:44: > >> Is there a difference in how much data could potentially be lost in > >> case of a failover? E.g. because 9.0 replicates the changes quicker than > >> 8.4? > > > > There's nothing that 9.0 does that you