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Posted to users@tomcat.apache.org by jiang ying <jc...@hotmail.com> on 2006/03/02 07:25:24 UTC
WHY TOMCAT MEMORY FROM 1G TO 15M IN 10 MINUTES
Hi.
When I run the TPCW bookstore application, I found the server behave
erratic.
Experiment enviroment:
Hardware: a client PC, two server PCs. Each PC has two 1.59 GHz AMD
Opteron, 2GB RAM, and a 30 GB disk. One server machine runs theWeb server
and application server software, while the other contains the database. All
the machines run 2.4 Linux Kernel and are connected through a LAN of
1000Mb/s.
Web Server: Tomcat 5.5.12
Database: mysql 5.0.18
Client Workload Generator: the freely available Java TPC-W
implementation developed by the PHARM research group at the University of
Wisconsin-Madison http://www.ece.wisc.edu/~pharm/tpcw.shtml
The file descriptor limit has been increased to 8192.
The maxconnection of Tomcat is 1000.
To solve the heap exception of Tomcat, JAVA_OPTS='-Xms256m -Xmx256m' is
set.
Q1: When I emulate 100 EBs ( the command line: java rbe.RBE -EB
rbe.EBTPCW1Factory 400 -OUT run1.m -RU 100 -MI 600 -RD 100 -WWW
http://tomcatserver:8080/ -CUST 288000 -DEBUG 2") , the tomcat memory drops
severly from 1G to 15M.
Could anyone kindly tell me why the tomcat cosumes so much memory?
Thank you.
yours cylinder
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Re: WHY TOMCAT MEMORY FROM 1G TO 15M IN 10 MINUTES
Posted by David Delbecq <de...@oma.be>.
JAVA_OPTS='-Xms256m -Xmx256m' <-- your tomcat memory should never reach
1G with this parameter!
the tomcat memory drops severly from 1G to 15M <-- do you mean tomcat
memory usage or tomcat free memory?
jiang ying a écrit :
> Hi. When I run the TPCW bookstore application, I found the server
> behave erratic. Experiment enviroment: Hardware: a client PC, two
> server PCs. Each PC has two 1.59 GHz AMD Opteron, 2GB RAM, and a 30 GB
> disk. One server machine runs theWeb server and application server
> software, while the other contains the database. All the machines run
> 2.4 Linux Kernel and are connected through a LAN of 1000Mb/s. Web
> Server: Tomcat 5.5.12 Database: mysql 5.0.18 Client Workload
> Generator: the freely available Java TPC-W implementation developed by
> the PHARM research group at the University of Wisconsin-Madison
> http://www.ece.wisc.edu/~pharm/tpcw.shtml The file descriptor limit
> has been increased to 8192. The maxconnection of Tomcat is 1000. To
> solve the heap exception of Tomcat, JAVA_OPTS='-Xms256m -Xmx256m' is
> set. Q1: When I emulate 100 EBs ( the command line: java rbe.RBE -EB
> rbe.EBTPCW1Factory 400 -OUT run1.m -RU 100 -MI 600 -RD 100 -WWW
> http://tomcatserver:8080/ -CUST 288000 -DEBUG 2") , the tomcat memory
> drops severly from 1G to 15M. Could anyone kindly tell me why the
> tomcat cosumes so much memory? Thank you.
> yours cylinder
>
> _________________________________________________________________
> 与联机的朋友进行交流，请使用 MSN Messenger: http://messenger.msn.com/cn
>
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Re: WHY TOMCAT MEMORY FROM 1G TO 15M IN 10 MINUTES
Posted by Filip Hanik - Dev Lists <de...@hanik.com>.
I would consider 15M pretty low. If the memory drops,what problem are
you having? Sounds like it would be worse going the other way.
jiang ying wrote:
> Hi. When I run the TPCW bookstore application, I found the server
> behave erratic. Experiment enviroment: Hardware: a client PC, two
> server PCs. Each PC has two 1.59 GHz AMD Opteron, 2GB RAM, and a 30 GB
> disk. One server machine runs theWeb server and application server
> software, while the other contains the database. All the machines run
> 2.4 Linux Kernel and are connected through a LAN of 1000Mb/s. Web
> Server: Tomcat 5.5.12 Database: mysql 5.0.18 Client Workload
> Generator: the freely available Java TPC-W implementation developed by
> the PHARM research group at the University of Wisconsin-Madison
> http://www.ece.wisc.edu/~pharm/tpcw.shtml The file descriptor limit
> has been increased to 8192. The maxconnection of Tomcat is 1000. To
> solve the heap exception of Tomcat, JAVA_OPTS='-Xms256m -Xmx256m' is
> set. Q1: When I emulate 100 EBs ( the command line: java rbe.RBE -EB
> rbe.EBTPCW1Factory 400 -OUT run1.m -RU 100 -MI 600 -RD 100 -WWW
> http://tomcatserver:8080/ -CUST 288000 -DEBUG 2") , the tomcat memory
> drops severly from 1G to 15M. Could anyone kindly tell me why the
> tomcat cosumes so much memory? Thank you.
> yours cylinder
>
> _________________________________________________________________
> 与联机的朋友进行交流，请使用 MSN Messenger: http://messenger.msn.com/cn
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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