Hi all,
I'm new to apache. I am experiencing a problem with apache load
balancer. I configured the load balancer across 10 app servers
(glassfish domains), but when I see the way the cookies (and load) are
distributed I see a very uneven distribution. Here is my proxy
configuration:
fc112959@(protected)
# configuration for clustering more then one glassfish
ProxyPass / balancer://cluster/ stickysession=JSESSIONID nofailover=Off
ProxyPassReverse / http://kenstgapp01:8080
ProxyPassReverse / http://kenstgapp01:8280
ProxyPassReverse / http://kenstgapp01:8380
ProxyPassReverse / http://kenstgapp01:8480
ProxyPassReverse / http://kenstgapp01:8580
ProxyPassReverse / http://kenstgapp01:8780
ProxyPassReverse / http://kenstgapp01:8880
ProxyPassReverse / http://kenstgapp01:8980
ProxyPassReverse / http://kenstgapp01:9080
ProxyPassReverse / http://kenstgapp01:9180
<Proxy balancer://cluster/ >
BalancerMember http://kenstgapp01:8080 route=kenstgapp01_8080
loadfactor=1
BalancerMember http://kenstgapp01:8280 route=kenstgapp01_8280
loadfactor=1
BalancerMember http://kenstgapp01:8380 route=kenstgapp01_8380
loadfactor=1
BalancerMember http://kenstgapp01:8480 route=kenstgapp01_8480
loadfactor=1
BalancerMember http://kenstgapp01:8580 route=kenstgapp01_8580
loadfactor=1
BalancerMember http://kenstgapp01:8780 route=kenstgapp01_8780
loadfactor=1
BalancerMember http://kenstgapp01:8880 route=kenstgapp01_8880
loadfactor=1
BalancerMember http://kenstgapp01:8980 route=kenstgapp01_8980
loadfactor=1
BalancerMember http://kenstgapp01:9080 route=kenstgapp01_9080
loadfactor=1
BalancerMember http://kenstgapp01:9180 route=kenstgapp01_9180
loadfactor=1
</Proxy>
fc112959@(protected)$
And here is how the load gets distributed across jmeter 10 clients: as
you can see, only 7 of the jvms get work, and among them the amount of
work they do is very uneven (second to last entry in each row is % of
cpu used by the process).
These domains are exactly the same. I've checked the cookie
distribution and reflects the load distribution (uneven). If I increase
clients I eventually get work in all jvms (still uneven), and that just
proves that all jvms can be routed thru apache load balancer. I am
generating load with jmeter. Any hints of what am I doing wrong? how to
fix it?
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
1388 root 3338M 3257M sleep 0 0 9:08:45 6.5% java/89
1414 root 3332M 3253M cpu28 0 0 7:32:01 4.2% java/92
1417 root 3333M 3253M cpu9 0 0 7:14:39 2.3% java/96
1424 root 3332M 3254M cpu12 0 0 7:03:12 2.2% java/89
1420 root 3332M 3254M cpu6 0 0 7:35:40 2.1% java/89
1411 root 3333M 3253M cpu29 0 0 7:31:31 1.9% java/87
3461 webservd 40M 32M sleep 0 0 0:00:03 0.3% httpd/1
3460 webservd 36M 26M sleep 0 0 0:00:03 0.3% httpd/1
3462 webservd 36M 26M sleep 0 0 0:00:03 0.3% httpd/1
3457 webservd 32M 27M cpu24 0 0 0:00:02 0.3% httpd/1
1423 root 3333M 3256M sleep 0 0 7:00:01 0.2% java/88
3348 webservd 40M 32M sleep 0 0 0:00:04 0.2% httpd/1
995 root 3536K 3072K sleep 100 - 0:00:46 0.1% cpustat/33
1360 webservd 43M 35M sleep 0 0 0:00:14 0.1% httpd/1
1337 webservd 43M 35M sleep 0 0 0:00:13 0.1% httpd/1
3559 webservd 13M 11M cpu20 0 0 0:00:00 0.1% hgwebdir.cgi/1
883 root 3848K 3832K cpu25 0 0 0:00:13 0.1% prstat/1
1011 webservd 43M 36M sleep 0 0 0:00:15 0.1% httpd/1
77 webservd 9016K 7832K sleep 0 0 0:16:18 0.1% memcached/1
Total: 166 processes, 1525 lwps, load averages: 10.00, 10.20, 10.03
TIA,
fdo
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