How to know installed Oracle Client is 32 bit or 64 bit?

OS: Windows 2008 Server R2

Oracle Client: 11.2

Many Thanks

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 *32

If 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

In Linux:

1. find where is sqlplus located,

   [oracle@LINUX db_1]$ which sqlplus /app/oracle/product/11.2.0/db_1/bin/sqlplus

2. Determine the file type,

[oracle@LINUX db_1]$ file /app/oracle/product/11.2.0/db_1/bin/sqlplus

/app/oracle/product/11.2.0/db_1/bin/sqlplus: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs). For GNU/Linux 2.6.18, not stripped.

None of the links above about lib and lib32 folder worked for me with Oracle Client 11.2.0 But I found this on the OTN community:

> As far as inspecting a client install to try to tell if it's 32 bit or > 64 bit, you can check the registry, a 32 bit home will be located in > HKLM>Software>WOW6432Node>Oracle, whereas a 64 bit home will be in > HKLM>Software>Oracle.

The following, taken from here, was not mentioned here:

> If the Oracle Client is 32 bit, it will contain a "lib" folder; but if it is a 64 bit Oracle Client it will have both "lib" and "lib32" folders.

> Also, starting in Oracle 11.2.0.1, the client version for 64-bit and the Oracle client for 32-bit are shipped separately, and there is an $ORACLE_HOME/lib64 directory.

> $ORACLE_HOME/lib/ ==> 32 bit $ORACLE_HOME/lib64 ==> 64 bit

> Or

> $ORACLE_HOME/lib/ ==> 64 bit $ORACLE_HOME/lib32 ==> 32 bit

For the Oracle 12.1 windows client, looking at the output from the TNSPING command seems to work:

With 32 bit installed on 64 bit OS:

> C:>tnsping > > TNS Ping Utility for 32-bit Windows: Version 12.1.0.2.0 - Production > on 02-FEB-2 016 15:44:37 > > Copyright (c) 1997, 2014, Oracle. All rights reserved.

With 64 bit installed on 64 bit OS:

> D:>tnsping > > TNS Ping Utility for 64-bit Windows: Version 12.1.0.1.0 - Production > on 02-FEB-2 016 16:00:23 > > Copyright (c) 1997, 2013, Oracle. All rights reserved.

For Unix

grep "ARCHITECTURE" $ORACLE_HOME/inventory/ContentsXML/oraclehomeproperties.xml

And the output is:

<PROPERTY NAME="ARCHITECTURE" VAL="64"/> 

For Windows

findstr "ARCHITECTURE" %ORACLE_HOME%\inventory\ContentsXML\oraclehomeproperties.xml

And the output can be:

<PROPERTY NAME="ARCHITECTURE" VAL="64"/>

On 64-bit system:

32-bit Driver: C:\Windows\SysWOW64\odbcad32.exe

64-bit Driver: C:\Windows\System32\odbcad32.exe

Go to Drivers Tab
Version is shown there as well.