Latch, mutex and beyond

July 9, 2011

Mutex waits. Part 1. “Cursor: Pin S” in Oracle 10.2-11.1. Invisible and aggressive.

Filed under: Contention,History,Instrumentation,Mutex,Patches,Spinlock — andreynikolaev @ 1:18 pm

Oracle KGX mutexes appeared more than 7 years ago. However, mutex waits are still obscure. Oracle Documentation provided only brief description of mutex wait events without any information about wait durations and timeouts.
Look at the following timeline:

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