https://issues.apache.org/bugzilla/show_bug.cgi?id=51212
Bug #: 51212
Summary: QueryStats has synchornisation issues
Product: Tomcat Modules
Version: unspecified
Platform: All
Status: NEW
Severity: major
Priority: P2
Component: jdbc-pool
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
Created attachment 27017
--> https://issues.apache.org/bugzilla/attachment.cgi?id=27017
Patch with Atomic approach
Hello,
I don't know if it is volontary but I think QueryStats fields should be Atomic
because they are accessed by multiple threads at same time.
I made a Load test with heavy load and collected results of SlowQueryReport and
I get Sql queries with 0 as number of executions which is wrong as they have
been executed at least once.
By the way I don't know which approach will perform better:
- synchronize add/failure
- Use Atomic
Maybe you did this for performance reasons.
Regards
Philippe Mouawad
http://www.ubik-ingenierie.com
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