Re: Seeing context switch storm with 10/13 snapshot of

On Tue, 18 Oct 2005 00:25:25 +0100
Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>
> Please try this patch and see if it reduces the CS storm:
>
> http://archives.postgresql.org/pgsql-patches/2005-10/msg00091.php

Yes, I will. I'd been trying to figure out what triggered it, as I was unable
to reproduce it for a while, but it gets there eventually. I had just
re-started with auto vacuum off, as that might be the trigger? I'll apply the
patch, re-build and re-start with auto vacuum back on, they way I'm running when
I know I'll see it.

>
> Do you have access to another similar machine to do comparative testing?
> Do you have access to another machine with different CPU arch? It would
> be good to firmly isolate this to a CPU architecture interaction issue.

I do have access to a windows version of the DL-380 but it's only a single CPU.
I've a dual AMD server at home, but I cannot run against the db there (reverse
VPN?). I'd need that reproducibility Tom wanted that I have not gotten to yet.

>
> Are the Xeons particularly old models? How new is the server?

It is a HP Proliant (post Compaq merger) DL-380. A couple years old.

Thanks,
Rob