Topic: Library cache lock and cursor: mutex X
There was a basis
All hung on 1 request, thus ASH Viewer shows that there is operation CPU
[spoiler] [img=http://joxi.ru/VrwnWOlUOg3pDA.jpg] [/spoiler]
The request the elementary on reversal to the reference manual, but is a lot of where the used.
In the same time if to look in v$session a field event shows waiting cursor: mutex X
Through any time type waitings library cache lock (red on 1 screen) got
Prompt in what side to look. SR we get