Comment 4 for bug 302798

On Thu, Nov 27, 2008 at 8:55 PM, Jeroen T. Vermeulen <email address hidden> wrote:
> I think two sentences got conflated there. I believe these timeouts
> mean that the server is now fetching things from disk again that in the
> past months were constantly cached in memory.
>
> There are optimizations that we discarded to avoid complicating our
> schema optimization a year ago. We could reinstate some of those if the
> problem becomes serious before message sharing is completed.

We still have enough RAM to cache all the ondisk files. It is a
different issue. I only have vague guesses at the moment on what could
cause the perceived behavior. Possibly the global shared area is too
large. Possibly we need more frequent checkpoints.