ZEO cache best practices, was Re: [ZODB-Dev] ZEO 3.2 (Zope 2.7) ->3.6 (Zope 2.9) upgrading: Much slower startup due to cache file creation

[Paul Winkler]

On Tue, Apr 18, 2006 at 01:25:59PM -0400, Tim Peters wrote:
> That's an example:  the post-MVCC ZEO cache is a single file, and
> there are no cache flips; flips are unique to the pre-MVCC two-file
> ZEO cache design.

Interesting. Is there a recommended way now to judge whether your
ZEO cache is "big enough"?  I used to grep the logs for cache flips
to see how often they were happening.  (I didn't have a formula
for what to do with that information, it was a pretty fuzzy
process that typically ended up as "make the cache really huge and
forget about it").


-- 

Paul Winkler
http://www.slinkp.com