… true-VARCHAR support for MEMORY tables for MySQL 5.0. Although this …The code was proposed for inclusion into upstream sources but unfortunately never …MEMORY tables, they are no replacement for application-specific tests. We start by checking if there is any performance regression when the variable…
Post: Death match! EBS versus SSD price, performance, and QoS
February 21, 2011 By 54 Comments
…my experience, and you are likely to need to replace one, for example. If you rent this array …variable even though the devices are idle most of the time. In some time periods, the write latency gets into…to work really well if the database fits in memory and isn’t write-intensive. But the high and…
Post: Side load may massively impact your MySQL Performance
November 13, 2011 By 7 Comments
…concurrently because Sysbench should run completely in memory and use a lot of CPU … worth to note MySQL actually uses midpoint insertion for its buffer pool replacement policy . Unfortunately by…into changing how buffer pool is split into young and old sublists via innodb_old_blocks_pct variable…
Post: MySQL, AIX5L and malloc()
November 3, 2008 By 11 Comments
… as the replacement for “old” P5…memory per process by default. To use more, you have to use “Large Address Space” memory model so AIX will split memory into…MySQL working fine: export LDR_CNTRL=’MAXDATA=0×80000000′ It allows database to allocate 2GB of memory…multiplier in MAXDATA variable at run…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…MySQL thread id 9697561, query id 188161264 localhost root update insert into…variable. Value is specified in microseconds. mysql… replacing btree…memory usage. You can see total memory allocated by Innodb (sometimes it is higher than you anticipated), amount of memory allocated in additional memory…
Comment: Countless storage engines
May 4, 2007 By 6 Comments
… small and so this file fits in memory. In general PBXT seems to be very …MySQL official marketing never position MySQL as such per say (for obvious reasons) but it is indeed set as replacement…engines though one need to take into account a lot of variables – how stable is engine and integration…
Post: Economics of Performance Optimization
March 13, 2008 By 9 Comments
…risky if it breaks because immediate replacement may not be available and keeping… would usually have 1-2GB of memory may be couple of SATA hard drives… moves to the higher end another variable comes into the play – even if your…he market offering services around MySQL and LAMP and MySQL is one of them…
