Hottest items in the WebSphere Application Server Dynacache Servlet cache

Provided is a DynaCache program that leverages PMI and JMX to output the top 100 templates in the servlet cache in terms of in-memory cache hits. 
You can use this client program to determine which items in the cache are the most popular.

When there are a lot of cache-entries  and consequently templates in the cachespec.xml this tool will give you a good idea of what is hot or not. The utility of this tool decreases when the cache-entry names are not granular. For instance some cachespec.xml's use the single front controller, with a lot of the cache-ids hanging off a usually a single cache-entry. For now the program/tool only looks at the in-memory cache hits and not disk hits. Java src is included in the jar if you want to modify it :-)

Attached jar contains the src and the class files:
http://dl.dropbox.com/u/12872475/Dynacache-WXS/dc-pmi.jar

This program requires the template servlet cache PMI group to be enabled.

Usage:
C:\WebSphere7\AppServer\java\bin\java -Djava.ext.dirs=C:\WebSphere7\AppServer\runtimes;c:\WebSphere7\AppServer\lib;C:\WebSphere7\AppServer\java\jre\lib;C:\WebSphere7\AppServer\java\jre\lib\ext;C:\WebSphere7\AppServer\lib com.ibm.ws.sample.DynaCachePMIClient localhost 8881-standalone smitaNode01 server1 baseCache

• Replace C:\WebSphere7\AppServer with your $WAS_HOME &rerun.
• Program arguments are in orange. 
• There is also a test.properties that can be modified inside the jar for more granular control, if you do not want to provide arguments.

Output:

host=localhost , port=8881 , connector=SOAP , distributed=false

main: create the adminclient

getAdminClient: hostStr=localhost , portStr=8881

getAdminClient: WasClientPath=C:/WebSphere7/AppServer/profiles/base

*****************************************

DynaCache Automated Tests

Host     : smita.raleigh.ibm.com

Port     : 9081

PMI Port : 8881 connector: SOAP

Cell     : smitaNode01Cell

Node     : smitaNode01

Server   : server1

BaseCacheSize: 2000

Offload to Disk: false

IhsEnabled: true

globalSecurityEnabled: false

IHS Host    : localhost

IHS Port    : 80

Distributed Caching: false

zOSMode: false

*****************************************

Usage: DynaCachePMIClient [ <-distributed|-standalone> ]

Arguments passed in to com.ibm.ws.sample.DynaCachePMIClient

args[0] localhost

args[1] 8881

args[2] -standalone

args[3] smitaNode01

args[4] server1

args[5] baseCache

Found 1

...node:smitaNode01 match: true

...process:server1 match: true

my perf MBean: WebSphere:name=PerfMBean,process=server1,platform=dynamicproxy,node=smitaNode01,version=7.0.0.19,type=Perf,mbeanIdentifier=PerfMBean,cell=smitaNode01Cell,spec=1.0

Get statistics from all cacheModules

stats name=cacheModule.template

    HitsInMemoryCount[21]=23

    HitsOnDiskCount[22]=0

    ExplicitInvalidationCount[23]=0

    LruInvalidationCount[24]=0

    TimeoutInvalidationCount[25]=0

    InMemoryAndDiskCacheEntryCount[26]=4

    RemoteHitCount[27]=0

    MissCount[28]=4

    ClientRequestCount[29]=27

    DistributedRequestCount[30]=0

    ExplicitMemoryInvalidationCount[31]=0

    ExplicitDiskInvalidationCount[32]=0

    LocalExplicitInvalidationCount[34]=0

    RemoteExplicitInvalidationCount[35]=0

    RemoteCreationCount[36]=0

    stats name=/dynacachetests/TimeStamp

        HitsInMemoryCount[21]=11

        HitsOnDiskCount[22]=0

        ExplicitInvalidationCount[23]=0

        LruInvalidationCount[24]=0

        TimeoutInvalidationCount[25]=0

        InMemoryAndDiskCacheEntryCount[26]=2

        RemoteHitCount[27]=0

        MissCount[28]=2

        ClientRequestCount[29]=13

        DistributedRequestCount[30]=0

        ExplicitMemoryInvalidationCount[31]=0

        ExplicitDiskInvalidationCount[32]=0

        LocalExplicitInvalidationCount[34]=0

        RemoteExplicitInvalidationCount[35]=0

        RemoteCreationCount[36]=0

    stats name=/dynacachetests/TimeStamp1

        HitsInMemoryCount[21]=12

        HitsOnDiskCount[22]=0

        ExplicitInvalidationCount[23]=0

        LruInvalidationCount[24]=0

        TimeoutInvalidationCount[25]=0

        InMemoryAndDiskCacheEntryCount[26]=2

        RemoteHitCount[27]=0

        MissCount[28]=2

        ClientRequestCount[29]=14

        DistributedRequestCount[30]=0

        ExplicitMemoryInvalidationCount[31]=0

        ExplicitDiskInvalidationCount[32]=0

        LocalExplicitInvalidationCount[34]=0

        RemoteExplicitInvalidationCount[35]=0

        RemoteCreationCount[36]=0

TOP 100 TEMPLATES IN THE CACHE baseCache

/dynacachetests/TimeStamp1=12

/dynacachetests/TimeStamp=11

Dynacache PMI structure: