[Zope3-Users] ZODB database conflict error

[Andreas Jung]

--On 24. Juni 2008 09:46:23 +0200 Gregor Giesen <grgi at fa.uni-tuebingen.de> 
wrote:

> Hi,
>
> under heavy load of my zope application I got the following error:
>
>   WARNING ZopePublication Competing writes/reads at ... database
> conflict error (oid 0x03a272, class BTrees.OIBTree.OIBucket, serial this
> txn started with 0x0376b0db577575cc 2008-06-24 06:51:20.498163, serial
> currently committed 0x0376b0dc374f1244 2008-06-24 06:52:12.963017)
>
> This is due to many reads and writes (adding objects) to a BTreeFolder.
> So my questions are:
> 1. How can I increase the number of retries to resolve the conflict?
> 2. I think this might be a design problem of my application; should I
> use another backend for storing such data (sql, etc.)?


How about application specific conflict resolution (_p_resolveConflict() 
hook)? How about using a nested folder structure in order to reduce the 
number of conflicts?

-aj
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