SSLSessionCache not working

Am I doing anything wrong in enabling SSL caching? My configuration:

SSLSessionCache "shm:/opt/apps/logs/ssl_cache(512000)"
SSLSessionCacheTimeout  300
SSLMutex default

When LogLevel is changed to debug, I can see that SSLSessionCache is initialized, but when I see the server-status URI, all I see is zero stats.

Screenshot of stats

Why am I not seeing stats similar to http://httpd.apache.org/server-status?

Version: Apache/2.2.25 mod_ssl/2.2.25

Solution

I didn't see any SSL traffic because SSL termination was happening at F5.