WebSphere Application Server - verbose garbage collection with usable time-stamps

Author

verbose garbage collection with usable time-stamps

Marc Schöchlin

2006-10-31, 1:32 am

Hi !

I would like analyze the gc-behaviour of a websphere-application running
on websphere 6 ND on solaris 10 (sun jvm)

I´m currently writing the gc-behaviour with the following jvm argument:
----
-verbosegc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps
----

Unfortunately the output is not not very well designed for the needs of
sysadmins :
---
133.896: [GC 133.897: [DefNew: 8128K->8128K(8128K), 0.0000443
secs]133.897: [Tenured: 18240K->2573K(24576K), 0.1340199 secs]
26368K->2573K(32704K), 0.1343218 secs]
144.112: [GC 144.112: [DefNew: 8128K->8128K(8128K), 0.0000544
secs]144.112: [Tenured: 16564K->2304K(24576K), 0.1246831 secs]
24692K->2304K(32704K), 0.1249602 secs]
---

The first column describes the seconds passed since the start of the
virtual machine...
Is there possibility to format the timestamp to something useful like
unix-epoch or a iso-timestamp ?
---

Best regards

Marc Schoechlin

Ben_

2006-10-31, 1:32 am

Because you're running on Solaris, the Sun JVM is used and you can Sun's
tooling to analyze GC stats.

The first that comes to mind is GCPortal
(http://java.sun.com/developer/techn...mming/GCPortal/), but
I think there are others.

2006-10-31, 1:22 pm

Get the server start time from startServer.log.

You can add the gc time (e.g:133.896) with that for your analysis.

There is no option to format the time.

PerformanceTester,
www.readytestgo.com