On Mon, Oct 19, 2009 at 6:38 AM, Chris Withers <ch...@simplistix.co.uk> wrote: > Hi All, > > I saw a few entries like these in the event log of a storage server that > stopped responding for a couple of minutes: > > INFO ZEO.StorageServer (30332) tid to old for invq 252618838173181593 < > 252618856850589832 > ------ > INFO ZEO.StorageServer (30332) tid to old for invq 252618838177204172 < > 252618856850589832 > > What do these mean?
It means that the server wasn't able to provide "quick" invalidations because a client was disconnected too long. The message isn't very well worded, even aside from the misspelling. Normally, in this situation, a client would then perform a full cache verification, which puts lots of pressure on the server, possibly making it unresponsive. There's a client option "drop-cache-rather-than-verify" that can prevent this. Arguably, this is a "don't be stupid" option that should be enabled by default. Jim -- Jim Fulton _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
