[ZODB-Dev] zeo client patch in connection.py
PWilliams at diamonddata.com
Wed Mar 7 12:00:03 EST 2007
Here is a patch. The version is 3.6.2 and was distributed with Zope 2.9.5.
From: Christian Theune [mailto:ct at gocept.com]
Sent: Wednesday, March 07, 2007 9:43 AM
To: Paul Williams
Cc: zodb-dev at zope.org
Subject: Re: [ZODB-Dev] zeo client patch in connection.py
could you send this again as a patch produced using `diff` against your
original sources OR tell us which version of Zope/ZODB you used as the
starting point for this patch.
Am Mittwoch, den 07.03.2007, 08:52 -0600 schrieb Paul Williams:
> Hi Everyone,
> We were experience problems with our zeo client setup on redhat rhel4.
> The client would just quit responding. No memory or cpu increase was
> associated with this. The client would remain hung until it was
> We looked on the client using Netstat and the status was ESTABLISHED
> with the zeo server. On the zeo server the netstat said LISTENING.
> When running the deadlockdebugger, one thread was in asnycore wait.
> The others were normal actions such as folder listing or folder
> We implemented a couple of lines of code on line 641 of connection.py
> in the ZEO/zrpc packages
> We added and else clause to call self.close() if delay is over one
> second. We found that one second wasn't quite enough and moved it to
> 5 seconds.
> Now we find out that this drastically improved our performance. The
> servers are now < 1 second per page load. Before, they could be 5
> seconds or more, if they loaded at all. Also, our servers used to
> crash several times a day and they now haven't crashed in almost a
> I just wanted to put this out there and see if anyone has any comments
> at all. I need to get a more permanent solution than this, but it is
> what we have for now.
> System Configuration
> Zope 2.9.5
> Plone 2.5.1
> Python 2.4.3
> Redhat Rhel4
> Communications between our zeo clients and zeo server only route
> through a switch.
> Thank you for any help,
> Paul Williams
> For more information about ZODB, see the ZODB Wiki:
> ZODB-Dev mailing list - ZODB-Dev at zope.org
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