How to know installed Oracle Client is 32 bit or 64 bit?
A simple way to find this out in Windows is to run SQLPlus from your Oracle homes's bin directory and then check Task Manager. If it is a 32-bit version of SQLPlus, you'll see a process on the Processes tab that looks like this:
sqlplus.exe *32If it is 64-bit, the process will look like this:
sqlplus.exe
Go to %ORACLE_HOME%\inventory\ContentsXML folder and open comps.xml file
Look for <DEP_LIST> on ~second screen.
If following lines have
PLAT="NT_AMD64" then this Oracle Home is 64 bit.PLAT="NT_X86" then - 32 bit.You may have both 32-bit and 64-bit Oracle Homes installed.
One thing that was super easy and worked well for me was doing a TNSPing from a cmd prompt:
TNS Ping Utility for 32-bit Windows: Version 11.2.0.3.0 - Production on 13-MAR-2015 16:35:32