… is my list of items you need to keep into account while using MyISAM tables. Recovery. MySQL was running stable for us, giving…. Cache/Session tables (you can throw them away if it server crashes). You can use multiple of cache tables to avoid concurrency issues. Temporary tables used…
Post: Cache Performance Comparison
August 9, 2006 By 73 Comments
… cache invalidated with each update) and ability to cache composed objects which may correspond to multiple MySQL queries. On Selecting from the table…k`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; INSERT INTO `test` VALUES (‘test’,'MyTestString’); 3) You need all caches to work, ie query cache enabled, …
Post: Using Multiple Key Caches for MyISAM Scalability
November 26, 2008 By 8 Comments
… – MyISAM Does Not Scale, or it does quite well – two main things stopping you is table…Multiple Tables to solve Table Locks problem you can also use multiple Key Caches to reduce or virtually eliminate key cache… SELECT INTO OUTFILE or pipe it to mysql directly as explained here to create key caches….
Post: Beware of MyISAM Key Cache mutex contention
August 12, 2008 By 10 Comments
… the client loading data to MyISAM tables at very high rate. Hundreds of millions rows are loaded daily into single MySQL instance with… copied from key_cache to the thread local space. Happily MyISAM allows you to create multiple key caches . We use “keycache per table” this case…
Comment: MySQL File System Fragmentation Benchmarks
July 9, 2008 By 28 Comments
…cache_size=0 table_cache=256 tmp_table_size=93M thread_cache_size=8 #*** MyISAM Specific options myisam_max_sort_file_size=100G myisam…RPMs: 7200 using multiple inserts per transaction for 1 innodb table (25 inserts or …into the table using myisam I got 1186 and 1177 inserts per second into the table …
Post: MySQL Crash Recovery
July 30, 2006 By 26 Comments
…not to mention such potentially multiple operation DDL statements as RENAME TABLE – these are most … caches (key_buffer, innodb_buffer_pool, query_cache,table_cache) are cleaned, so may be OS caches. … populate caches. For MyISAM key_cache this can be done by using LOAD INDEX INTO CACHE statement, …
Post: MyISAM Scalability and Innodb, Falcon Benchmarks
October 12, 2007 By 10 Comments
…this time We are faced with one for MyISAM tables. We saw that several times in synthetic … key cache so if you have contention while multiple indexes are used you can create multiple key caches …solution we proposed in this case was converting table t1 into InnoDB, and results: Threads Queries/sec …
Post: Why you should ignore MySQL's key cache hit ratio
February 28, 2010 By 27 Comments
… execution time. Alas, that correlation fools us into thinking it’s a cause, and we…are many subtleties including the possibility of having multiple key caches. But I’ll give the simple version…’s dedicated to MyISAM tables. Consider your mixture of storage engines (some InnoDB, some MyISAM, which is …
Post: Crashes while using MyISAM with multiple key caches
July 18, 2009 By Leave a Comment
… last couple of years I have ran into random MySQL crashes in production when multiple key caches were used. Unfortunately this never was…’re using multiple key caches there are often some scripts in place which adjust their size or change mappings of the tables. No… will run into the bug – In my practice number of people using multiple key caches with relatively light load never ran into this issue…
Comment: Beware of MyISAM Key Cache mutex contention
August 14, 2008 By 10 Comments
… that when multiple MyISAM tables are included, the performance is worse than only one MyISAM table. And even if we add cache the table index,…mysql> LOAD INDEX INTO CACHE lps.user_1,lps.user_2,lps.user_3,lps.user_4 IGNORE LEAVES; +————+————–+———-+———-+ | Table | Op | Msg…
