… built on multiple columns or intersection of multiple accesses by indexes. When we talk about index_merge_intersection, we should understand that mysql finds… “show people with fotos only” and mysql can use index to filter records before fetching any rows. How much it will give? Not…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
… 3396, OS thread id 1150142816 fetching rows, thread declared inside InnoDB 166 mysql tables in use 1, locked 0 MySQL thread id 8078, query… 3396, OS thread id 1147980128 fetching rows, thread declared inside InnoDB 114 mysql tables in use 1, locked 0 MySQL thread id 8077, query… writes are pending requests on buffer pool level. Innodb may merge multiple requests to one on file level so these are different…
Post: Heikki Tuuri Innodb answers - Part I
October 26, 2007 By 19 Comments
… scalability with multiple threads and multiple concurrent transactions ? HT…merged in Innodb mainline yet. Q11: If read-ahead is happening and Innodb needs to access one of the pages being fetched…care: you MUST use row-based binlogging and … in 5.1: static MYSQL_SYSVAR_ULONG(thread_concurrency,…
Post: Recovering Innodb table Corruption
July 4, 2008 By 22 Comments
…table ? There are multiple things which can…| optimize | status | Operation failed | +———–+———-+———-+———————————-+ 2 rows in set, 2 …fetch data to the script instead make sure to use LIMIT or PK Rangers when MySQL…activity, insert buffer merge or recovery from …
