[ http://issues.apache.org/jira/browse/DERBY-2122?page=all ]
Knut Anders Hatlen closed DERBY-2122.
-------------------------------------
Fix Version/s: 10.3.0.0
Resolution: Fixed
Derby Info: (was: [Patch Available])
Committed v2 patch with revision 481181.
> Optimize ContainerLock.isCompatible()
> -------------------------------------
>
> Key: DERBY-2122
> URL: http://issues.apache.org/jira/browse/DERBY-2122
> Project: Derby
> Issue Type: Improvement
> Components: Store, Performance
> Affects Versions: 10.2.1.6
> Reporter: Knut Anders Hatlen
> Assigned To: Knut Anders Hatlen
> Priority: Trivial
> Fix For: 10.3.0.0
>
> Attachments: derby-2122-v1.diff, derby-2122-v1.stat,
> derby-2122-v2.diff, derby-2122-v2.stat
>
>
> The numbers at http://wiki.apache.org/db-derby/Derby1961MethodCalls indicate
> that ContainerLock.isCompatible() is called many times per transaction, at
> least when there are multiple concurrent clients operating on the same
> containers. Currently, it looks into a two-dimensional array to find out
> whether two locks are compatible. This could be implemented more efficiently,
> for instance by having a bit pattern in each ContainerLock object
> representing which lock types it is compatible with.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
