Comments on: Backport of micro-time patch to mysql 4.1 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/ Everything about MySQL Performance Sat, 21 Nov 2009 05:23:57 -0800 http://wordpress.org/?v=2.8.4 hourly 1 By: MySQL Performance Blog » Microslow patch for 5.1.20 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-146860 MySQL Performance Blog » Microslow patch for 5.1.20 Wed, 18 Jul 2007 19:27:11 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-146860 [...] patch has been there for some time, but only for earlier MySQL editions such as 4.1 and 5.0. Now it’s also available for the latest [...] [...] patch has been there for some time, but only for earlier MySQL editions such as 4.1 and 5.0. Now it’s also available for the latest [...]

]]> By: peter http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4863 peter Mon, 09 Oct 2006 22:00:55 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4863 Michael, Good you've found the problem. Regarding query you have in your example it is slow because of SQL_CALC_FOUND_ROWS - it effectively negates the limit. Michael,

Good you’ve found the problem. Regarding query you have in your example it is slow because of SQL_CALC_FOUND_ROWS – it effectively negates the limit.

]]> By: Michael Monashev http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4861 Michael Monashev Mon, 09 Oct 2006 21:05:14 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4861 Sorry, I find problem. I used old mysqld. Sorry, I find problem.
I used old mysqld.

]]> By: Michael Monashev http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4860 Michael Monashev Mon, 09 Oct 2006 21:01:45 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4860 I use MyISAM tables... I use MyISAM tables…

]]> By: Michael Monashev http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4859 Michael Monashev Mon, 09 Oct 2006 21:00:22 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4859 I do it again, how you write. After I run slow query and get this: # Time: 061010 0:58:54 # User@Host: root[root] @ localhost [] # Query_time: 7 Lock_time: 0 Rows_sent: 1 Rows_examined: 227073 use mindmix; SELECT SQL_CALC_FOUND_ROWS * FROM `topics` WHERE `forum_id` !=1 LIMIT 1; Do you have another ideas? I do it again, how you write.
After I run slow query and get this:

# Time: 061010 0:58:54
# User@Host: root[root] @ localhost []
# Query_time: 7 Lock_time: 0 Rows_sent: 1 Rows_examined: 227073
use mindmix;
SELECT SQL_CALC_FOUND_ROWS * FROM `topics` WHERE `forum_id` !=1 LIMIT 1;

Do you have another ideas?

]]> By: Vadim http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4847 Vadim Mon, 09 Oct 2006 14:09:06 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4847 Michael, It looks like you are still using unpatched mysqld. The procedure is: get sources patch with: patch -p1 < patch.slow-micro.4.1.21.diff ./configure --prefix=/usr/local/mysql-micro ...other-options.. make make install In /usr/local/mysql-micro you should get binary Michael,

It looks like you are still using unpatched mysqld.

The procedure is:
get sources
patch with: patch -p1 < patch.slow-micro.4.1.21.diff
./configure –prefix=/usr/local/mysql-micro …other-options..
make
make install

In /usr/local/mysql-micro you should get binary

]]> By: Michael Monashev http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4844 Michael Monashev Mon, 09 Oct 2006 13:03:55 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4844 I patch mysql source, but it doesn't work. I can not set long_query_time=0 . The least value of long_query_time - 1. If I set long_query_time=0, "SHOW VARIABLES;" show me long_query_time=1. And I see always seconds in slow log: Query_time: 2 Lock_time: 0 . How to turn on the patch? I patch mysql source, but it doesn’t work.

I can not set long_query_time=0 . The least value of long_query_time – 1. If I set long_query_time=0, “SHOW VARIABLES;” show me long_query_time=1.

And I see always seconds in slow log: Query_time: 2 Lock_time: 0 .

How to turn on the patch?

]]> By: Michael Monashev http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4785 Michael Monashev Thu, 05 Oct 2006 18:42:11 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4785 Thanks. Very usfull patch for query profiling. Большое спасибо. Thanks.
Very usfull patch for query profiling.

Большое спасибо.

]]> By: Ruslan Zakirov http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/comment-page-1/#comment-4566 Ruslan Zakirov Sun, 01 Oct 2006 20:39:54 +0000 http://www.mysqlperformanceblog.com/2006/10/01/backport-of-micro-time-patch-to-mysql-41/#comment-4566 Thanks. I'm going to use it once I had time. Thanks. I’m going to use it once I had time.

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