Stefan
Message: 1 Date: Fri, 24 Jan 2003 21:13:19 -0500 Subject: Re: [JBoss-dev] Re: how's ecperf going? From: David Jencks <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED]Thanks for the update. Can you let me know which hashmap in CachedConnectionManager is causing contention? Also, I have a plan for 4 anyway to only swap transactions when they actually change. it should be pretty easy to fix in 3/3.2 directly also. thanks david jencks On Friday, January 24, 2003, at 08:23 PM, Stefan Reich wrote:Hi Bill,
I am running ecperf regularly on the 3.0 and 3.2 branches. I
accumulated a bunch of fixes for scalability and performance problems
already, plus a few fixes for inconsistent lock usage that I will
merge soon.
Here are some things I noticed:
* the test fails when I deploy the BMP version, some of the beans that
have been created don't seem to end up in the database.
* the CMP version must be tweaked to use the util.xml BMP version of
the beans (search for SERIALIZABLE in the README) to work correctly
* the CMP version doesn't deploy anymore on the current 3.2 branch
* with the 3.2 branch I get many more spurious esceptions than with 3.0
* a HashMap in the class CachedConnectionManager seems to be the most
contended lock
* JAWS checks for the existence of a PK before inserting a new row in
the database. This is pretty expensive.
* the LogInterceptor usage of the NDC class makes it a global source
of contention
* TxInterceptorCMP suspends and resumes a transaction in all cases,
sometimes even twice. This can be very expensive, especially with
global transactions.
Since I am running the tests on PowerPC Macs and the Apple VM it is
hard to compare the results with other platforms.
Stefan
On Thursday, Jan 23, 2003, at 19:11 US/Pacific, Bill Burke wrote:
Are you getting decent results? I heard from Scott that you've made some improvements. Need me to merge your changes at all? Just want to know what's up. Thanks, XXXXXXXXXXXXXXXX Bill Burke Chief Architect JBoss Group, LLC XXXXXXXXXXXXXXXX
------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Jboss-development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
