You can use -Xloratio parameter For WebSphere Application Server V6.0, V5.1 and V5.0 (Java 1.4.2) .If your WAS version is WebSphere Application Server V7.0, V6.1 (Java V1.6, V1.5) ,There is no need to explicitly set the size. The value can be manually limited with using the -Xloainitial and -Xloamaximum, however it is not recommended.

The detailed technote :

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Certificate Management:

SSL Certificates expiration monitoring for WebSphere or any java based application server using java keystore
If you are a WebSphere Administrator or any Application Server (WebLogic, Tomcat) administrator you might already know that managing the ssl certificates in a large complex environments becomes hectic and troublesome because of the different expiration dates of the certificates that websphere uses and also the ssl certificates of the external systems (like SAP , Siebel) that websphere applicaton server might connect to using a secure connection, multiple administrators in an organization renewing it and not keeping tracking of the expiration dates. The problem is , SSL certificate might expire resulting in servers will not initialize and your running servers will stop operating, becomes unresposive if not properly renewed on time. Hence this article will explain how you can monitor the expiration of the ssl certificates using a simple command and proactively monitor the expiration dates, setup your calendar and renew it on time to prevent any downtimes.
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File related commands

1) find text in the matching files and show the filename with the pattern. The below example shows the list of filenames and the location of the hostname in those files, which will be helpful when changing hostnames for your websphere installation.

find . -name ‘*.xml’ -print | xargs grep ‘hostName’ /dev/null

bash-2.05b# find /usr/IBM/WebSphere/AppServer/profiles/AppSrv01/config/ -name ‘server*.xml’ -print | xargs grep ‘hostName’ /dev/null | more
/usr/IBM/WebSphere/AppServer/profiles/AppSrv01/config/cells/portalserverCell01/nodes/portalserverNode01/serverindex.xml:<SERVERINDEX:ServerIndex xmi:version=”2.0″ xmlns:xmi=”” xmlns:serverindex=”
.0/serverindex.xmi” xmi:id=”ServerIndex_1″ hostName=”” endPointRefs=”NamedEndPoint_1130375480667 NamedE
ndPoint_1130375480668 NamedEndPoint_1130375480669 NamedEndPoint_1130375480670 NamedEndPoint_1130375480671 NamedEndPoint_113037548067

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Network related Commands


a) dig (domain information groper) – is a flexible tool for interrogating DNS name servers.
b) nslookup – Queries a name server for a host or domain lookup.
c) host – DNS lookup uility.

The below example shows the information like CNAME , Aliases, ipaddres , etc about

a) dig
bash-2.05b# dig

; <<>> DiG 9.2.4 <<>>
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1088
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 7, ADDITIONAL: 0

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Disk Usage related Commands to monitor Disk space

1)Disk Usage on all mounts
df -h -T

Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 ext3 2.9G 785M 2.0G 29% /
/dev/sda7 ext3 57G 9.3G 45G 18% /cust
/dev/sda6 ext3 2.0G 82M 1.8G 5% /lc
none tmpfs 5.7G 0 5.7G 0% /dev/shm
/dev/sda5 ext3 2.0G 33M 1.8G 2% /tmp
/dev/sda3 ext3 2.0G 64M 1.8G 4% /var

2)prints just one line with the total size of the directory, the below example show the size of the /usr/IBM/Websphere WebSphere Portal Server directory.
du -ch | grep total

bash-2.05b# du -ch | grep total
6.3G total

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Performance related Commands to monitor system performance:

1) Find the process that uses most CPU
ps -eo pcpu,pid,user,args | sort -k 1 -r | head -2
(eg) output of the above command when websphere server process is utilizing the most of the CPU

71.7 31237 root /cust/IBM/WebSphere/AppServer/java/bin/java

-Dwas.status.socket=54859 -classpath


2) Find the last 10 process that use the most CPU
ps -eo pcpu,pid,user,args | sort -k 1 -r | head -10

2.1 6375 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=2132 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppServ
0.3 13886 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=25042 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppSer
0.2 17271 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=9606 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppServ
0.2 17871 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=9606 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppServ
0.2 17713 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=9140 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppServ
0.1 18499 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=11309 -classpath /cust/IBM/WebSphere/AppServer/profiles/AppSrv01/properties:/cust/IBM/WebSphere/AppSer
0.1 17504 root /cust/IBM/WebSphere/AppServer/java/bin/java -Xbootclasspath/p:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmorb.jar:/cust/IBM/WebSphere/AppServer/java/jre/lib/ext/ibmext.jar -Dwas.status.socket=8969 -classpath /cust/IBM/WebSphere/AppServer/profiles/Dmgr01/properties:/cust/IBM/WebSphere/AppServer

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