What is a Thread dump? How will you take in unix/linux and windows?

 This is especially useful if your Java application sometimes seems to hang when running under load, as an analysis of the dump will show where the threads are stuck.

We will take thread dump in following ways,
Ø  Linux : kill -3 PID
Ø  Windows (console mode) : crtl+break
Ø  Windows (service) : beasvc -dump -svcname:mydomain_myserver.

The data file and change log file used by the embedded LDAP server can potentially grow quite large. You can configure maximum sizes for these files with the following weblogic.Server command line arguments:

• -Dweblogic.security.ldap.maxSize=<max bytes>, which limits the size of the data file used by the embedded LDAP server. When the data file exceeds the specified size, WebLogic Server eliminates from the data file space occupied by deleted entries.
• Dweblogic.security.ldap.changeLogThreshold=<number of entries>, which limits the size of the change log file used by the embedded LDAP server. When the change log file exceeds the specified number of entries, WebLogic Server truncates the change log by removing all entries that have been sent to all Managed Servers.