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denbo
Joined: 01 Jan 1970
Posts: 35
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 Posted: Wed Mar 25, 2009 3:36 pm Post subject: Memory profiling of Tomcat does not show all instances |
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I'm running a memory profiling session on a Tomcat 6.0.18.
There is a session scoped bean in my application which I create for each user - there should be one instance per running session. However, when I look at the corresponding entry in the Live Profiling Results window I see only one instance no matter how many concurrent sessions there are. I have made sure I really have simultaneous sessions (disabled Cookies, monitor session creation/destruction). I also see only 1 Catalina session instance:
org.apache.catalina.session.StandardSession / 88 B (0%) / 1 (0%) / 1 / 174.0 / 1
(that's classname / live bytes / Live Objects / Allocated Objects / Avg. Age / Generations)
Why do I get these results? I would have expected 3 live objects for my 3 running sessions.
Thank you in advance!! |
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Tomas Hurka
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| Posted: Thu Mar 26, 2009 2:56 pm Post subject: Memory profiling of Tomcat does not show all instances |
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On 25 Mar 2009, at 16:37, denbo wrote:
| Quote: | I'm running a memory profiling session on a Tomcat 6.0.18.
There is a session scoped bean in my application which I create for
each user - there should be one instance per running session.
However, when I look at the corresponding entry in the Live
Profiling Results window I see only one instance no matter how many
concurrent sessions there are. I have made sure I really have
simultaneous sessions (disabled Cookies, monitor session creation/
destruction). I also see only 1 Catalina session instance:
org.apache.catalina.session.StandardSession / 88 B (0%) / 1 (0%) /
1 / 174.0 / 1
(that's classname / live bytes / Live Objects / Allocated Objects /
Avg. Age / Generations)
Why do I get these results? I would have expected 3 live objects for
my 3 running sessions.
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One explanation can be that Memory profiling by default tracks every
10th object allocation. You can change it when you invoke Profile ->
Profile Main Project. Set it to 1 instead of default 10.
Bye,
--
Tomas Hurka <mailto:address-removed>
NetBeans Profiler http://profiler.netbeans.org
VisualVM http://visualvm.dev.java.net
Software Engineer, Developer Platforms Group
Sun Microsystems, Praha Czech Republic
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denbo
Joined: 01 Jan 1970
Posts: 35
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| Posted: Thu Mar 26, 2009 3:30 pm Post subject: |
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Hey Tomas,
you found the solution. I indeed had left the setting on 10 allocations.
Thank you very much!
Dennis |
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