… AFTAB, crash recovery is far cheaper in modern versions of InnoDB: https://blogs.oracle.com/mysqlinnodb/entry/innodb_recovery_is_now_faster And from the manual: http://dev.mysql.com/doc/refman/5.5/en/innodb-performance-recovery.html “If…
Post: Innodb Recovery - Is large buffer pool always better ?
July 17, 2007 By 3 Comments
… Innodb crash recovery on box with large amount of memory (64GB) with Innodb Buffer pool configured to be just a bit over 20GB. Innodb recovery was taking long hours with reasonably sized Innodb log files… we got it recovered much faster. Interesting enough the problem does not seems to happen with all recoveries out where as 20GB…
Post: How InnoDB handles REDO logging
February 3, 2011 By 19 Comments
… media recovery we will not know if that action has previously been executed as we will start recovery from the last checkpoint.InnoDB… memory which has much faster access than the underlying disk(s). How are the REDO records applied? InnoDB processes the REDO records… by enabling the innodb_recovery_stats option in Percona Server, which allows you to see the progress made during recovery. How does this…
Post: A recovery trivia or how to recover from a lost ibdata1 file
June 3, 2011 By 8 Comments
… at least be able to recover the data with the Innodb recovery tool of Aleksandr Kuzminsky a colleague on the Percona European… nearly 200 tables was not really exciting. I needed something faster and more automatic so, after reading this post from Chris… one table. For that one, I had to use the Innodb recovery tools but even then, I had a hard time. I…
Post: Innodb Recovery Update - The tricks what failed.
May 24, 2007 By 3 Comments
… avoid dumping the data and find some other way to recovery. Examining Innodb page content and crash information we figured out it… with innodb_force_recovery=4 was confirmed to be added in 5.0.33, meaning you could not really recover corrupted Innodb tables… slow restoring even week old backup and running roll forward recovery using binary log can be a lot faster.
Post: The relationship between Innodb Log checkpointing and dirty Buffer pool pages
February 17, 2012 By 10 Comments
… Innodb stops (read: crashes) with dirty buffer pool pages, Innodb recovery must be done to rebuild the last consistent picture of the database. Recovery… write all the changes into a log, it will be faster to do on the fly as transactions come in than…/or use the global tablespaces) *cough ext3 cough*. innodb_adaptive_flushing: An Innodb plugin/5.5 setting that tries to be smarter…
Post: How innodb_open_files affects performance
November 18, 2009 By 4 Comments
… and not faster ? Because on the second run there were a lot of dirty pages in innodb buffer …InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files… InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer… InnoDB: Doing recovery…
Post: Lost innodb tables, xfs and binary grep
November 9, 2010 By 12 Comments
… of the file recovery tools for xfs – apparently they are all targeting specific file types and sure enough InnoDB is not one… thing I would note about bgrep – it was so much faster than matching text using grep, so if you happen to… better. We are considering shipping bgrep as part of percona recovery toolset, with some additional converters so we can match against…
Post: Recovery beyond data restore
August 2, 2008 By 11 Comments
… like Innodb corruption or soft crash which you can’t recover promptly enough. In this case most typically you would plan recovery… (and they will be replicated down to all slaves) the faster however (especially if you have many tiers of replication) is… from several of backup generations and do point in time recovery. Timing recovery is also important. Especially for write intensive environments it…
Post: Effect of adaptive_flushing
December 4, 2009 By 5 Comments
… important change for the client here is the recovery time — by enabling adaptive flushing, InnoDB purged modified data much more aggressively, resulting in very little unflushed changes, which translates to much faster crash recovery. There…
