…INNODB_BUFFER_POOL_CONTENT; +———–+——-+——–+———+———-+————+———–+————–+————–+—————-+—————–+————–+——————+ | BLOCK_NUM | SPACE | OFFSET | RECORDS | DATASIZE | FLUSH_TYPE | FIX_COUNT | LRU_POSITION | PAGE…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…Innodb_buffer_pool_pages_datablogpercona.commanual Innodb_buffer_pool_pages_dirtyblogpercona.commanual Innodb_buffer_pool_pages_flushedblogpercona.commanual Innodb_buffer_pool_pages_freeblogpercona.commanual Innodb_buffer_pool_pages_latchedblogpercona.commanual Innodb_buffer_pool_pages…
Post: Heikki Tuuri Innodb answers - Part I
October 26, 2007 By 19 Comments
… Innodb fuzzy checkpointing is activated HT: InnoDB flushes about 128 dirty pages per flush. That means that under a heavy write load, a new flush…way InnoDB does the buffer pool flush. I think Yasufumi Kinoshita talked at Users’ Conference 2007 about his patch that makes InnoDB‘s flushes smoother…
Post: MySQL 5.5.8 - in search of stability
January 3, 2011 By 11 Comments
…innodb_flush_log_at_trx_commit = 2 innodb_flush_method = O_DIRECT innodb_log_buffer_size = 64M innodb_buffer_pool_size = 26G innodb_buffer_pool_instances=16 innodb…
Comment: The relationship between Innodb Log checkpointing and dirty Buffer pool pages
January 7, 2013 By 10 Comments
… flushed? Yes. > what difference between this one and tranaction log checkpoint flush to disk? > sorry, above Innodb_buffer_pool_pages_flushed should be Innodb_data_fsyncs. > Innodb_buffer_pool_pages_flushed is number of pages that be flushed. An fsync…
Post: Disaster: MySQL 5.5 Flushing
September 18, 2011 By 27 Comments
…InnoDB configured for this hardware innodb_flush_log_at_trx_commit = 2 innodb_flush_method = O_DIRECT innodb_log_buffer_size = 16M innodb_buffer_pool_size = 52G innodb…
Post: How InnoDB handles REDO logging
February 3, 2011 By 19 Comments
… the double write buffer to ensure consistent page writes. Why log? Since InnoDB tries to keep the working set in memory (InnoDB Buffer Pool), therefore the changes made by transactions will occur in volatile memory and later be flushed to disk. So…
Post: Innodb Recovery - Is large buffer pool always better ?
July 17, 2007 By 3 Comments
…) with Innodb Buffer pool configured to be just a bit over 20GB. Innodb recovery was taking long hours with reasonably sized Innodb log files… pages in the flush list which takes a lot of time… Innodb is smart about a way it flushes pages, it tries to merge sequential pages together and generally flush things in order…
Post: Innodb Fuzzy checkpointing woes
May 10, 2006 By Leave a Comment
… – Instead of being spread over time at certain time Innodb starts to flush pages very agressively seriously slowing down or even almost stalling… case many pages fall in the same LSN range scheduled for flush and Innodb might end up flushing most of buffer pool pages.     Now as the pages are flushed they get…
Comment: When EXPLAIN estimates can go wrong!
October 15, 2011 By 7 Comments
… | grep -i innodb_buffer_pool_pages | Innodb_buffer_pool_pages_data | 141 | | Innodb_buffer_pool_pages_dirty | 0 | | Innodb_buffer_pool_pages_flushed | 0 | | Innodb_buffer_pool_pages_free | 10098 | | Innodb_buffer_pool_pages_misc | 0 | | Innodb_buffer_pool_pages_total | 10239… | grep -i innodb_buffer_pool_pages | Innodb_buffer_pool_pages_data | 224 | | Innodb_buffer_pool_pages_dirty | 0 | | Innodb_buffer_pool_pages_flushed | 0 | | Innodb_buffer_pool_pages_free | 10015 | | Innodb_buffer_pool_pages_misc | 0 | | Innodb_buffer_pool_pages_total | 10239…
