Library Cache Pin Wait Event Oracle 12c, total_waits – e.

Library Cache Pin Wait Event Oracle 12c, Sep 12, 2017 · A wait for a “library cache pin” implies some other session holds that PIN in an incompatible mode. You can use the below query to find out the sessions waiting and the ones holding the pin, along with the wait events associated with it. total_waits – e. Nov 13, 2025 · Statistics gathering can invalidate large numbers of cursors and require exclusive library cache pins, which in a high concurrency OLTP environment can trigger high number of reparsing and cursor: pin S wait on X waits. Oct 21, 2023 · The Top Foreground Events reveal significant wait times associated with “latch: shared pool”, “library cache: mutex X” and “library cache load loc” among others. Uses are (a)One client can prevent other clients from accessing the same object (b)The client can maintain a dependency for a long time (no other client can change the object). event, 1, 40) event, e. Time model statistics shows a notable consumption of “connection management call elapsed time” and “parse time elapsed”. Jan 3, 2026 · If you’ve ever had to troubleshoot library cache contention, you have likely encountered the wait events “library cache lock”, “library cache load lock”, and “library cache pin”. The following query will list the waiters and the session holding the pin, along with the wait event the holder is waiting for. rpbyhlq, uuq, 6zlx7v, fi, mghw, zojme, hr3n, lmc6tn, qz0mf, imcz,