January 2012
Intermediate to advanced
542 pages
11h 28m
English
Content preview from Oracle Database 11gR2 Performance Tuning CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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V$LATCH_CHILDREN
This view displays statistics about child latches.
Fields
The most relevant view fields are:
CHILD#: The child latch numberLATCH#: The parent latch numberNAME: The latch nameGETS: The number of times the latch is requested in willing-to-wait modeMISSES: The number of times the latch is requested in willing-to-wait mode, and the requestor had to waitSLEEPS: The number of times a willing-to-wait latch request resulted in a session sleepingSPIN_GETS: The number of times a willing-to-wait latch request was satisfied only after a spinWAIT_TIME: The elapsed time spent waiting for the latch in microsecondsIMMEDIATE_GETS: The number of times the latch is requested in no-wait modeIMMEDIATE_MISSES: The number of times a no-wait latch request ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.