Hi All,
We are doing some load testing on our setup and find that the cpu use
age of tomcat reported by top on the two systems is not equal.
Typically we see figures like ~400% to 800% cpu on one machine and
~50% on the other machine for the java process. We would expect that
the two cpu values to be equal.
The jkstatus page on box one shows the following after a restart.
Although before a restart the Max column was showing 250 for jcpres1
and 32 for jcpres2.
Name Type Host Addr Act State D F M V
Acc Err CE RE Wr Rd Busy Max Route RR
Cd Rs
jcpres1 ajp13 172.16.4.11:8009 172.16.4.11:8009 ACT
OK 0 1 1 869 4276 2 4 0 939K
286M 1 11 jcpres1
0/0
jcpres2 ajp13 172.16.4.12:8009 172.16.4.12:8009 ACT
OK 0 1 1 869 4277 2 1 0 943K
280M 2 9 jcpres2
0/0
and box 2
Name Type Host Addr Act State D F M V
Acc Err CE RE Wr Rd Busy Max Route RR
Cd Rs
jcpres1 ajp13 172.16.4.11:8009 172.16.4.11:8009 ACT
OK 0 1 1 484 3872 0 4 0 850K
256M 3 10 jcpres1
0/0
jcpres2 ajp13 172.16.4.12:8009 172.16.4.12:8009 ACT
OK 0 1 1 483 3871 0 4 0 850K
260M 1 10 jcpres2
0/0
Our system setup.
Both machines are running the the following software on RedHat 4ES
Httpd 2.2.4
Mod JK 1.2.25
Tomcat 6.0.12
Java 1.6.0_01
Box 1.
workers.properties
# JK Status worker config
worker.list=jkstatus
worker.jkstatus.type=status
# Presentaton Load Balancer Config
worker.list=preslb
worker.preslb.type=lb
worker.preslb.balance_workers=jcpres1,jcpres2
worker.preslb.sticky_session=1
worker.jcpres1.port=8009
worker.jcpres1.host=172.16.4.11
worker.jcpres1.type=ajp13
worker.jcpres1.lbfactor=1
worker.jcpres1.fail_on_status=503,400,500,909
worker.jcpres2.port=8009
worker.jcpres2.host=172.16.4.12
worker.jcpres2.type=ajp13
worker.jcpres2.lbfactor=1
worker.jcpres2.fail_on_status=503,400,500,909
Box 2.
workers.properties
# JK Status worker config
worker.list=jkstatus
worker.jkstatus.type=status
# Presentaton Load Balancer Config
worker.list=preslb
worker.preslb.type=lb
worker.preslb.balance_workers=jcpres1,jcpres2
worker.preslb.sticky_session=1
worker.jcpres1.port=8009
worker.jcpres1.host=172.16.4.11
worker.jcpres1.type=ajp13
worker.jcpres1.lbfactor=1
worker.jcpres1.fail_on_status=503,400,500,909
worker.jcpres2.port=8009
worker.jcpres2.host=172.16.4.12
worker.jcpres2.type=ajp13
worker.jcpres2.lbfactor=1
worker.jcpres2.fail_on_status=503,400,500,909
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