Hi claudio, The best value for innodb buffer pool size is considered to be 60 to 70 percent of ram. So in your case, this must be around 4 gb. That would work better.
Regards. Vikas -----Original Message----- From: "Claudio Nanni" <claudio.na...@gmail.com> Sent: 16-05-2013 14:12 To: "Rafał Radecki" <radecki.ra...@gmail.com> Cc: "mysql@lists.mysql.com" <mysql@lists.mysql.com> Subject: Re: Innodb innodb_buffer_pool_size? Hi Rafal, >I am trying to set the best value for innodb_buffer_pool_size. My system has 6GB of ram. >My question: how to tell if my innodb_buffer_pool_size is ok? If this is a MySQL dedicated server, In your case I would set it to 2GB-3GB. You will have the whole data in RAM now and for some time. >Does Buffer pool hit rate 1000 / 1000 mean that I can lower it? No. It means it is doing fine. And if you don't need RAM for anything else why lower it? >Does Free buffers 0 mean that I should make it larger? No. InnoDB will always try to allocate each block in the buffer pool. >Eventually what else to check? (a) mysql> SELECT engine,sum(data_length)/1024/1024 as DATA_MB,sum(INDEX_LENGTH)/1024/1024 as INDEX_MB FROM information_schema.tables GROUP BY engine; To check the real size of the dataset. (b) Note: mysql-server-5.0.58 you should upgrade to latest 5.0.96 Regards Claudio
