SESSION_CACHED_CURSOR on instance level

Team,
I am using Oracle 11.2.0.2.0 on a linux system.

I am confused about SESSION_CACHED_CURSOR. Is it on session level or instance level?

Oracle ADDM report shows:
Recommendation 2: Database Configuration
   Estimated benefit is .14 active sessions, 9.29% of total activity.
   ------------------------------------------------------------------
   Action
      Consider increasing the session cursor cache size by increasing the
      value of parameter "session_cached_cursors".
   Rationale
      The value of parameter "session_cached_cursors" was "50" during the
      analysis period.
Suggestion: set session_cached_cursors to 150.

How to increase SESSION_CACHED_CURSOR on instance level? That it will be increased for all sessions?

Hisham