Latch, mutex and beyond

December 16, 2010

Hotsos Symposium 2011

Filed under: Uncategorized — andreynikolaev @ 9:33 pm

I will be speaking at Hotsos Symposium 2011 which will be held on March 6 — 10, 2011 in Dallas.

Of course, I will speak about “Contemporary Latch Internals“. I would like to post my abstract here:

“Latches in Oracle Database were radically changed during the last 10 years to achieve higher levels of concurrency and performance. Using oradebug and DTrace, this presentation explores how the latch works. Contemporary latch does not use exponential backoff, most of them spin 10 times more then expected, and they may wait for an infinite time in a queue.

This presentation will show how Oracle instruments the latch operations, discuss parameters and statistics related to latch performance diagnostics, and fine grain tuning. It will also explore the long-standing question: when and how to tune the “_spin_count” and “_latch_classes“. DTrace provides additional capabilities to measure effectiveness and statistical properties of latch in production.”

Some parts of this abstract were appeared in my blog and discussed in seminars. There will be many new topics!
The Hotsos Symposium is the unique conference dedicated to Oracle performance. Hopefully to see you there!


1 Comment »

  1. I had the chance to attend your session at Hotsos. Your presentation was outstanding !


    Comment by Romeo Vasileniuc — March 8, 2011 @ 1:02 pm | Reply

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Blog at

%d bloggers like this: