Re: [PERFORM] 9.2.3 upgrade reduced pgbench performance by 60%

2013-03-31 Thread Jeff Janes
On Monday, March 25, 2013, Colin Currie wrote: > Hi, > > I recently upgraded PostgreSQL from 9.0.12 to 9.2.3 on a test server to > compare performance. I'm using pgbench to measure which results in around a > 60% reduction. > > The non-default configuration remains identical between versions excep

Re: [PERFORM] 9.2.3 upgrade reduced pgbench performance by 60%

2013-03-27 Thread Josh Berkus
> > I saw some similar results comparing 9.0 and 9.2 pgbench tests. My tests > were on a VM, but on a dedicate host/hardware with no other VM's running on > it to minimize variables. I didn't have a lot of time to dig into it, but I > do recall seeing more lock contention on updates on the 9.

Re: [PERFORM] 9.2.3 upgrade reduced pgbench performance by 60%

2013-03-26 Thread Nicholson, Brad (Toronto, ON, CA)
> -Original Message- > From: pgsql-performance-ow...@postgresql.org [mailto:pgsql- > performance-ow...@postgresql.org] On Behalf Of Josh Berkus > Sent: Monday, March 25, 2013 4:34 PM > To: pgsql-performance@postgresql.org > Subject: Re: [PERFORM] 9.2.3 upgrade reduced p

Re: [PERFORM] 9.2.3 upgrade reduced pgbench performance by 60%

2013-03-25 Thread Josh Berkus
> The Linux server is on a cloud and has 4GB RAM and 2 CPUs and the > same server is running both master and slave (these are separate in > production). If you'd like any more details please ask. Here are the > pgbench results: Presumably you created a new cloud server for 9.2, yes? I'd guess th