[Xapian-discuss] Search performance issues and profiling/debugging

[Chris Good]

Ron Kass wrote:
> I believe quite strongly that the issues we are seeing are not coming 
> from Xen, as per this instance it is a regular dedicated Linux (centos 
> 5) machine and the resources are fully dedicated to it.

I'd still encourage you to give it a go if only to rule it out and let
you run oprofile.  Running inside Xen certainly shouldn't affect your
match sets but it the diskwriter process kicking in could fully explain
some of the timing variances that you've seen when re-running queries.