…SHOW ENGINE INNODB STATUS and look for memory information block, which can use like this: ———————- BUFFER POOL AND MEMORY ———————- Total memory allocated 132183490560; in additional pool…Buffer pool size 7864319 Buffer pool size, bytes 128849002496 Free buffers…
Post: Multi Range Read (MRR) in MySQL 5.6 and MariaDB 5.5
March 21, 2012 By 10 Comments
…, the InnoDB buffer pool size is set to 6G and the buffer pool was warmed up, so that the relevant pages were already loaded in the buffer pool… the status counters above that both MySQL 5.6 and MariaDB 5.5 are reporting high numbers for Innodb_buffer_pool_read_ahead which shows that…
Post: Index Condition Pushdown in MySQL 5.6 and MariaDB 5.5 and its performance impact
March 12, 2012 By 12 Comments
… in preparation for the talk comparing the optimizer enhancements in MySQL 5.6 and MariaDB 5.5. We are taking a… optimizer enhancement Index Condition Pushdown (ICP). Its available in both MySQL 5.6 and MariaDB 5.5 Now let’s take…
Post: Join Optimizations in MySQL 5.6 and MariaDB 5.5
April 4, 2012 By 2 Comments
…InnoDB buffer pool size is set to 6G and the buffer pool was warmed up, so that the relevant pages were already loaded in the buffer pool…status counters. Counter Name MySQL 5.5 MySQL 5.6 MySQL 5.6 w/ join_buffer_size=6M & read_rnd_buffer_size…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…SHOW INNODB STATUS output, showing what you can learn from SHOW INNODB STATUS output and how to use this info to improve MySQL Performance. To start with basics SHOW INNODB STATUS…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…Innodb_buffer_pool_pages_latchedblogpercona.commanual Innodb_buffer_pool_pages_miscblogpercona.commanual Innodb_buffer_pool_pages_totalblogpercona.commanual Innodb_buffer_pool_read_aheadblogpercona.commanual Innodb_buffer_pool_read_ahead_evictedblogpercona.commanual Innodb_buffer_pool…
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
…this this matter the other day – choosing innodb_buffer_pool_size Q36: There have been several MySQL bugs opened about multi-core scalability (concurrent …“show innodb statusâ€. select * from table where id=5 show innodb status: Hash table size 10624987, used cells 1, node heap has 1 buffer(s…
Post: Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit
November 24, 2011 By 2 Comments
…buffer pool stats, the I/O stats might be slightly smaller than they should be. ==9090== Possible data race during write of size…show_status_array(THD*, char const*, st_mysql_show_var*, enum_var_type, system_status_var*, char const*, st_table*, bool, Item*) (sql_show…
Post: Some little known facts about Innodb Insert Buffer
January 13, 2009 By 11 Comments
…Innodb Insert Merge Buffer are available in SHOW INNODB STATUS output: ————————————- INSERT BUFFER AND ADAPTIVE HASH INDEX ————————————- Ibuf: size 7545, free list len 3790, seg size…
Post: InnoDB compression woes
May 20, 2011 By 14 Comments
…. Using 24GB of memory for buffer_pool will give us fully in-…size=5000000 –oltp-read-only=on –rand-init=on –num-threads=16 –max-requests=0 –rand-type=uniform –max-time=1800 –mysql…SHOW INNODB STATUS (SEMAPHORES) for workload with compression tables we can see 1 Mutex at 0xe13880 ‘&buf_pool…
