…takes a long time. That much Peter covered really well. But how…MySQL. In 5.0 and newer, you can just watch Innodb_os_log_written from SHOW GLOBAL STATUS, too.) mysql…flushing and checkpointing process. At this rate, this server could use about 110 MB of logs…
Post: DROP TABLE and stalls: Lazy Drop Table in Percona Server and the new fixes in MySQL
June 22, 2012 By 33 Comments
… how Lazy Drop Table works and how the new DROP Table works in MySQL …MySQL‘s version of drop table relies on taking the buffer pool mutex and a mutex on the flush…were captured in the slow log by setting long_query_time to 0. … dropped, MySQL 5.5.23 does show an improvement over MySQL version prior to…
Post: MySQL Backup tools used by Percona Remote DBA for MySQL
March 13, 2013 By 8 Comments
… common, but does happen) You…s bin logs –compress option,…long-queries to avoid nasty problems with “FLUSH …Takes very little resources to run, can run about anywhere with disk space and writes out binlog files sequentially. Tips/Tricks (how…long term backups Decompressing Percona XtraBackup for MySQL…
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
…log flushes. A question is why to use a flash memory at all, when a battery-backed disk controller write-back cache does…_pool_size Q36: There have been several MySQL bugs opened about multi-core scalability (concurrent … We can OPTIMIZE the table, but how long will this take? Is there a facility we …
Comment: Benchmarks of new innodb_flush_neighbor_pages
July 3, 2012 By 8 Comments
….com/2012/06/mysql-how-to-scale-inserts.html [Quote…smaller and didn’t take that long to remove.” …flush_log_at_trx_commit = 0 (this seems to help a lot with write performance) The flush…mysql like varnish for http webserver should speed up mysql since its already technically on the disk. Also btw does…
Post: Evaluating IO subsystem performance for MySQL Needs
March 5, 2008 By 23 Comments
…MySQL needs so I’ve decided to write some simple steps you can take…I hoped this issue is long fixed since that time… …optimize seeks. Lets us see how writes are doing: For …stored in controller cache and flushed to the disk in background -…thread – so it does not only help database log writes but has…
Post: Connecting orphaned .ibd files
May 13, 2011 By 19 Comments
…long (UNIV_PAGE_SIZE in the source code). Let’s take…FLUSH_LSN 8 “the file has been flushed to disk at least up to this lsn” (log…How let’s connect actor.ibd from sakila database taken from some MySQL… from such error ibdconnect does check if the …lib/mysql/ibdata1 # 5. Now you can start MySQL and take …
Post: Percona XtraDB Cluster - installation and setup webinar follow up Q&A
October 28, 2012 By 4 Comments
…does that mean a 0.25 as from logs… built-in mysql replication are …long as there are at least 3 datacenters, and the total number of the datacenters is odd. Q: How is configuration for the arbitrator? A: You should use the garbd binary for that, is takes… lock using FLUSH TABLES WITH READ…
Post: Innodb Recovery - Is large buffer pool always better ?
July 17, 2007 By 3 Comments
How does Buffer Pool size affects Innodb Performance ? I …a bit over 20GB. Innodb recovery was taking long hours with reasonably sized Innodb log files (256M) gradually progressing slower …mysqld buf_flush_insert_sorted_into_flush_list 37849 2.6804 no-vmlinux (no symbols) 8865 0.6278 mysql (no symbols…
Post: Should you move from MyISAM to Innodb ?
January 12, 2009 By 59 Comments
… available for all long reporting queries. …, higher concurrency, background flushes while on …taking way too much time to do restore for Innodb. On large scale installations mysqldump does…to consider them. How about Mixing Storage …paths in the MySQL server – in …(or Archive) for logging. Innodb Needs …
