Hi Thomas,
-> How much memory did you configure for your java environment? -->
-Xms4096m -Xmx8192m
-> Parameter If the java process eats too much memory, you can write a memory
dump when an OOM exception occurs.
Do we need to run this cmd with the startup.sh tomcat cmd , or can we run this
directly on server , before restarting the tomcat during OOM error.
-XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=/opt/tomcat/apache-tomcat-8.5.5/logs/javadump.dmp
Also can we use the cmd's also for generating heap and thread dumps , please
suggest are these cmd's useful for these error condition.
kill -3 PID
/opt/tomcat/jdk1.8.0_121/bin
./jmap -F -dump:format=b,file=/tmp/heap.bin PID
./jmap -F -dump:format=b,file=/tmp/heap.hpof PID
The below is the current memory foot print on the prod server now -
tomcat@[/tmp]$ free -m
total used free shared buffers cached
Mem: 32109 31422 687 69 1185 15452
-/+ buffers/cache: 14783 17325
Swap: 16383 0 16383
tomcat@[/tmp]$ free -m
total used free shared buffers cached
Mem: 32109 31422 687 69 1185 15452
-/+ buffers/cache: 14783 17325
Swap: 16383 0 16383
tomcat@[/tmp]$ free -m
total used free shared buffers cached
Mem: 32109 31422 687 69 1185 15452
-/+ buffers/cache: 14783 17325
Swap: 16383 0 16383
> > You can also open a JMX port and inspect the memory using during runtime,
> > e.g. with VirtualVM
We are still trying this option to get run , this is asking to have java 1.8 or
higher , can we use any other option to check the Memory during runtime?.
Please suggest . Thankyou !
Thanks & Regards,
Priyanka Kumawat | Middleware Admin
T +91.7879364483
EMail - priyanka.kuma...@dxc.com
DL - ams-leveraged-webadmin-offsh...@dxc.com
DXC Technology
-----Original Message-----
From: Thomas Hoffmann (Speed4Trade GmbH)
<thomas.hoffm...@speed4trade.com.INVALID>
Sent: 28 September 2022 12:02
To: Tomcat Users List <users@tomcat.apache.org>
Subject: AW: AW: MaxRequestWorkers error
> -----Ursprüngliche Nachricht-----
> Von: Rob Sargent <rsarg...@xmission.com>
> Gesendet: Dienstag, 27. September 2022 23:26
> An: users@tomcat.apache.org
> Betreff: Re: AW: MaxRequestWorkers error
>
>
>
> On 9/27/22 14:37, Thomas Hoffmann (Speed4Trade GmbH) wrote:
> >
> > How much memory did you configure for your java environment? --> Xmx
> > Parameter If the java process eats too much memory, you can write a
> memory dump when an OOM exception occurs.
> > E.g. with the parameters: -XX:+HeapDumpOnOutOfMemoryError -
> XX:HeapDumpPath=/var/logs/javadump.dmp"
> > You can also open a JMX port and inspect the memory using during
> > runtime, e.g. with VirtualVM
> > https://clicktime.symantec.com/15tStaehQas9svtdpJ83n?h=sL3qdTIGckj1F
> > A6lY59OUlcDtGbnfGtyeXufk7TPq70=&u=https://visualvm.github.io/
> >
> Pretty sure Thomas mean "VisualVM"
Of course :)
Link was right, name was wrong.
>
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