Comments on: SHOW INNODB STATUS walk through http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/ Everything about MySQL Performance Thu, 28 Aug 2008 00:20:54 +0000 http://wordpress.org/?v=2.5.1 By: SHOW INNODB STATUS: SEMAPHORES - World Class Ebooks http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-254783 SHOW INNODB STATUS: SEMAPHORES - World Class Ebooks Thu, 20 Mar 2008 06:04:27 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-254783 [...] A summary from the mySQL Performace Blog [...] [...] A summary from the mySQL Performace Blog [...]

]]> By: Bart Huls http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197756 Bart Huls Mon, 19 Nov 2007 09:30:52 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197756 Hi, When I enter : show table status like "test" \G; I get ... ... ... Comment: 1 row in set (0.05 sec) ERROR: No query specified The Comment field is empty Hi,
When I enter : show table status like “test” \G;

I get
…
…
…

Comment:
1 row in set (0.05 sec)

ERROR:
No query specified

The Comment field is empty

]]> By: peter http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197753 peter Mon, 19 Nov 2007 09:28:45 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197753 Check Comments for Innodb tables it shows amount of space free. Check Comments for Innodb tables it shows amount of space free.

]]> By: Bart Huls http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197713 Bart Huls Mon, 19 Nov 2007 08:33:38 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-197713 Hi, Can someone tell me how to get the free datapages available. I have 50 Gb of InnoDb, and I can't see for how many it's filled up. Hi,

Can someone tell me how to get the free datapages available.
I have 50 Gb of InnoDb, and I can’t see for how many it’s filled up.

]]> By: peter http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-181362 peter Fri, 26 Oct 2007 09:40:51 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-181362 How long uptime is it for ? Just 8 million of spin waits is not a lot. I would worry when it is over 100.000/sec How long uptime is it for ? Just 8 million of spin waits is not a lot. I would worry when it is over 100.000/sec

]]> By: Massimo http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-181277 Massimo Thu, 25 Oct 2007 22:01:43 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-181277 in a situation like this: ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 866195, signal count 850669 Mutex spin waits 7873759, rounds 34666553, OS waits 328525 RW-shared spins 178137, OS waits 79292; RW-excl spins 259415, OS waits 230381 I've both spin waits and OS waits very high. What do you suggest to reduce the number of slow OS waits? Thank you in a situation like this:

———-
SEMAPHORES
———-
OS WAIT ARRAY INFO: reservation count 866195, signal count 850669
Mutex spin waits 7873759, rounds 34666553, OS waits 328525
RW-shared spins 178137, OS waits 79292; RW-excl spins 259415, OS waits 230381

I’ve both spin waits and OS waits very high. What do you suggest to reduce the number of slow OS waits?

Thank you

]]> By: david http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-180055 david Mon, 22 Oct 2007 09:37:34 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-180055 purge stop working and feel stall,pls give us some clues. as the following snippet: Trx id counter 3 680747938 Purge done for trx's n:o purge stop working and feel stall,pls give us some clues. as the following snippet:
Trx id counter 3 680747938
Purge done for trx’s n:o

]]> By: Re: Trying to correlate SHOW STATUS and SHOW INNODB STATUS | Bla.es http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-169877 Re: Trying to correlate SHOW STATUS and SHOW INNODB STATUS | Bla.es Wed, 19 Sep 2007 14:36:32 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-169877 [...] also see something about this on www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/ by Peter [...] [...] also see something about this on http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/ by Peter [...]

]]> By: peter http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-160935 peter Thu, 30 Aug 2007 20:15:21 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-160935 I think you can use --raw or some similar option mysql client option to avoid new lines replaced with \n I think you can use –raw or some similar option mysql client option to avoid new lines replaced with \n

]]> By: Kiril http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-160055 Kiril Tue, 28 Aug 2007 08:44:25 +0000 http://www.mysqlperformanceblog.com/2006/07/17/show-innodb-status-walk-through/#comment-160055 Actually, I managed to overcome this, it seems that the output needs to be "piped" with " | " and passed to sed for example, then the proper interactions should be made like : sed "s/\\\\n/\\n/g" - in order to remove the new lines, then you can redirect the output with > to a logfile. Actually, I managed to overcome this, it seems that the output needs to be “piped” with ” | ” and passed to sed for example, then the proper interactions should be made like : sed “s/\\\\n/\\n/g” - in order to remove the new lines, then you can redirect the output with > to a logfile.

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