from java.io import FileWriter
from java.io import BufferedWriter
from java.util import Date
connect(eval('username'),eval('password'),eval('url'))
domainRuntime()
cd('/ServerRuntimes/' + eval('managedServerName') + '/JVMRuntime/' + eval('managedServerName'))
heapFreeCurrentPerOld = str(cmo.getHeapFreePercent())
heapFreeCurrentValOld = str(cmo.getHeapFreeCurrent())
cmo.runGC()
java.lang.Thread.sleep(int(eval('sleepTime')))
heapFreeCurrentPerNew = str(cmo.getHeapFreePercent())
heapFreeCurrentValNew = str(cmo.getHeapFreeCurrent())
newDate = Date()
fstream = FileWriter(eval('outputFile'),true)
out = BufferedWriter(fstream)
out.write(eval('managedServerName') + "," + str(newDate.getTime()) + "," + heapFreeCurrentPerOld + "," + heapFreeCurrentValOld + "," + heapFreeCurrentPerNew + "," + heapFreeCurrentValNew + "\n");
out.close();
disconnect()
exit()
There is also a property file which contains the configuration information
managedServerName=<MANAGED>
username=<USER>
password=<PASSWORD>
url=<URL>
sleepTime=<PAUSE>
outputFile=<PathToFile.csv>
And finally to run
$WL_SERVER_HOME/common/bin>wlst -loadProperties
This was written to output the free memory before and after GC for a particular managed server (which used to run jobs) on weblogic. It was cron'ed to run at fixed intervals. The generated file is used to check if there is a memory leak. The heap free current value should remain fairly constant. if it keeps reducing , we have a leak
