I think it really depends on how much memory you have, many of the
specjbb/specjappserver results are run on 32bit machines with 4GB ram
setting -Xmx2048m -Xms2048m is fine. As Matt points out there is more
than one out of memory condition. From memory I think 1.4.2 server had
a max permsize of 64mb so that is one candidate -XX:MaxPermSize=128m
If you are using 1.4.2 hotspot you can also use the free visualgc tool.
It will automatically detect a running jvm and show what the gc is doing
http://java.sun.com/performance/jvmstat/
regards
calvin
Rajiv M wrote:
I mean -Xms=-Xmx is a bad setting
~rajiv
On 3/29/06, *Rajiv M* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hello,
-Xmx2048m -Xms2048m - this is a very bad setting. this will induce
fragmentation of java heap, which means heap will fail to allot
contiguous memory for a large object allocation (greater than 7 MB
is considered large). This would subsequently end in an OOM.
Ideally -Xms256 and -Xmx1024 could be tried.
~rajiv
On 3/29/06, *Jeff Genender* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Whew 2G of Memory!!! Nice!!
Matt Hogstrom wrote:
In the tests I'm running I use the following:
java -server -Xmx2048m -Xms2048m -XX:-PrintTenuringDistribution
-XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC
-jar
/home/hogstrom/geronimo-1.0/bin/server.jar
I have not played too much with tuning the tenuring for the
eden sizes.
Do you have a stack trace indicating where you
failed? OutOfMemory
could mean several things.
Maxim Berkultsev wrote:
Hi, all!
I'm trying to make some performance evaluations of Geronimo
with a
help of
JMeter.
It has appeared relatively simple to get Geronimo out of
work. I've
tried to
load it with JMeter and a web primitive called
**PingServlet2MDBQueue** from
Daytrader bundle. I've created immediate load for 10 virtual
users and
unlimited number of requests. Within a minute or two
Geronimo stopped
responding to any request logging to console something like
...
18:32:56,180 WARN [ThreadedServer] EXCEPTION
java.lang.OutOfMemoryError
18:32:57,211 WARN [ThreadedServer] EXCEPTION
java.lang.OutOfMemoryError
...
Has someone used any specific VM options to run Geronimo
smoothly? (As
for
me I've tried starting Geronimo with Java 1.4.2 Hotspot(TM)
VM with
-server
option enabled).
Any advice or reference could be helpful. Thank you.
--
Best regards,
Maxim Berkultsev, Intel Middleware Products Division
--
~~~Truth is out there.~~~
--
~~~Truth is out there.~~~
