Comments on: Choosing innodb_buffer_pool_size

By: peter

peter — Fri, 24 Oct 2008 09:17:40 +0000

Sure. read_buffer_size and key_buffer_size are the most important and only key_buffer_size is statically allocated (even if you do not use much of MyISAM). Default value for key_buffer is OK even if you do not use MyISAM though if you have raised it dramatically I’d recommend cutting it back to 16M or even less (depending on implicit temporary table use)

By: http://blog.colnect.com/

http://blog.colnect.com/ — Wed, 22 Oct 2008 18:43:54 +0000

So when not using MyISAM, it would probably be helpful to reduce all its relevant buffers. Could you post more details about it?

By: kabonfootprint

kabonfootprint — Thu, 11 Sep 2008 19:52:28 +0000

Kabonfootprint is the one who open our mind in a better place. kabonfootprint

By: Choosing innodb_buffer_pool_size [ MySQL Performance Blog ]

Choosing innodb_buffer_pool_size [ MySQL Performance Blog ] — Sun, 08 Jun 2008 21:50:36 +0000

[...] 3rd 2007 11:41pm [-] From: mysqlperformanceblog.com [...]

By: MySQL - Tuning Tips | Solution Hacker

MySQL - Tuning Tips | Solution Hacker — Sat, 05 Apr 2008 08:11:27 +0000

[...] innodb_buffer_pool_size (for InnoDB - default at only 8MB) - reference [...]

By: Choosing innodb_buffer_pool_size

Choosing innodb_buffer_pool_size — Tue, 27 Nov 2007 08:37:49 +0000

[...] This is the cached version of http://www.mysqlperformanceblog.com/2007/11/03/choosing-innodb_buffer_pool_size/ We are neither affiliated with the authors of this page nor responsible for its content. Choosing innodb_buffer_pool_size [...]

By: SharkMan » Choosing innodb_buffer_pool_size

SharkMan » Choosing innodb_buffer_pool_size — Sat, 17 Nov 2007 20:35:02 +0000

[...] Check it out! While looking through the blogosphere we stumbled on an interesting post today.Here’s a quick excerpthere. Same as during last time I will provide my comments for some of the answers under PZ and will use HT for original Heikkis answer. Q26: You also say on Unix/Linux only one read-ahead can happen at the same time. How many read-aheads can be waiting in Queue when or Innodb will schedule more read-aheads only when given read-ahead is completed? HT: A query thread normally posts about 64 page read requests per a readahead. The InnoDB buffer is 256 page read requests for the aio read thread. [...]

By: peter

peter — Sun, 04 Nov 2007 20:35:12 +0000

Tom,

As I mentioned this becomes rather tricky question - it depends on sizes of MyISAM vs Innodb as well as workload.
Generally you ever have to use your intuition or do benchmarks if you want optimal numbers. For 50:50 space usage I would use 2:1 split towards giving more memory to Innodb ans then for MyISAM part use about 1/3-1/2 for Key buffer and just use other part as extra OS cache as MyISAM depends on that heavily.

By: tom

tom — Sun, 04 Nov 2007 19:29:56 +0000

Have you any recommendation about buffer settings for people using both InnoDB and MyIsam on the same server?

Is there any rule of thumb to follow in this case? In my case I prefer to keep logging data in MyIsam table because they are more compact (use much less space) and the insert speed is higher (in my case)

By: Innodb Performance Optimization Basics | MySQL Performance Blog

Innodb Performance Optimization Basics | MySQL Performance Blog — Sat, 03 Nov 2007 23:44:33 +0000

[...] it to 12G on 16GB box. UPDATE: If you’re looking for more details, check out detailed guide on tuning innodb buffer pool innodb_log_file_size - This depends on your recovery speed needs but 256M seems to be a good [...]