mysql performance tuning script

Original: http://bbs.landingbj.com/t-0-246222-1.html http://bbs.landingbj.com/t-0-245851-1.htmlOptimization of the MyISAM storage engine in MySQL performance tuning.The points to consider in optimizing the MyISAM storage engine are as follows:As far as possible index, MyISAM only cache index does not cache data;Adjust read-Write priority according to actual demand;Delay insertion, use Insert delay, reduce a

xf master# cd major-mysqltuner-perl-993bc18/#./ mysqltuner.pl You will receive detailed reports and recommended tips for MySQL usage. The following is an example of the output from the default MariaDB installation: MySQL Performance Optimization 15. Optimize and Repair MySQL database Sometimes tables in the

mysql performance tuning considerations and Indexing One: Optimization of the database1 impact of business needsFor example, posts in the Forum statistics, and real-time updates from a functional command select count ( * from can get results if the forum generates thousands of posts per second, we don't use MyISAM The store uses the innodb storag

may be a little bit small, or too much fragmentation. Query Cache Hit Ratio = (qcache_hits-qcache_inserts)/qcache_hits * 100% Sample server query Cache Fragmentation rate = 20.46%, query cache utilization = 62.26%, query cache Hit Ratio = 1.94%, hit ratio is poor, probably write more frequently, and possibly some fragments. 4 other 4.1 read_buffer_size 4.2 Slow Query Mysql> Show variables like '%slow% '; + —————— + ——-+ | variable_name | Value | + ——

stored, the maximum value and the pointer to the next primary leaf level block, or a non-leaf level block (pointer), where the pointer is the file number + block number of the block. In the B*tree block of Oracle, the key value of the indexed column is stored +rowid (the file number + block number + slot number of the data row) so that the data rows in the table can easily be found through the index by the key and ROWID values in the B*tree. The data row in the segment in Oracle is the heap str

Mysql mytop of performance tuning tools installation and use of 1. Mytop of the http://yunpan.cn/cVG3uSs2Jtt9h access Password 7ef1 2. Install Mytop first Necessary Components . Yum-y Install Perl-dbd-mysql Perl-dbiperl-termreadkeyIf you are prompted to locate the installation pack

) GTID2) in MySQL 5.6 gtid mode synchronous replication error cannot skip the workaround3) Improvement of Gtid replication in MySQL5.74) Gtid Replication traps5) Improvements to Gtid replication in MariaDB 10.1MySQL 5.6/5.7 Security recovery from library crashMariaDB 10.0/10.1 security recovery from vault crashSlave multi-threaded replication from librariesSlave supports multi-source replicationMySQL 5.7 Set synchronous replication filtering without r

Tags: MySQL performance tuning the selected character type for two field typesCharacter type: Char () is used to hold a fixed-length string with a maximum length of 255, and a value larger than the specified length is truncated, and a value smaller than the specified length is padded with spaces. Varchar () is used to hold variable-length strings, up to a length

PHP tutorials and MySQL tutorial performance tuning notes The larger the tmp_table_size=200m tmp_table_size, the smaller the probability of being converted to a disk TMP table PHP Program page MySQL closed in time Set the MySQL timeout timeLow-priority-updates set query a

. The Block Nested-loop algorithm uses the result set of the driver table (which can be simply understood as the preceding table) as the circular underlying data, and then one article queries the data in that result set by using the data in the resulting dataset as a filter to the next table, and then merges the results. If there is a third participating join, then the join result set of the previous two tables is used as the base data for the join, once again querying the data by looping throug

Mysql Performance Optimization script mysqltuner. pl usage introduction bitsCN.com MySQLTuner: http://github.com/rackerhacker/MySQLTuner-perl MySQLTuner usage:Downloading and using MySQLTuner is actually a very simple process: Wget mysqltuner. plPerl mysqltuner. pl If you 'd rather not invoke perl every time, just make it executable: Chmod u + x mysqltuner. pl./M