Título: Herramientas para Optimizar MySQL Publicado por: el-brujo en 28 Mayo 2008, 17:32 pm Herramientas:
MySQL Tuning Primer MySQLTuner mysqlreport Optimizar MySQL http://wiki.elhacker.net/bases-de-datos/mysql/optimizacion MySQL Tuning Primer Descargar el shell script: http://www.day32.com/MySQL/tuning-primer.sh chmod 755 y ejecutar Citar [root@ns58 ~]# ./tuning-primer.sh -- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.1.52-log i686 Uptime = 7 days 18 hrs 23 min 56 sec Avg. qps = 100 Total Questions = 67734325 Threads Connected = 157 Server has been running for over 48hrs. It should be safe to follow these recommendations To find out more information on how each of these runtime variables effects performance visit: http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html Visit http://www.mysql.com/products/enterprise/advisors.html for info about MySQL's Enterprise Monitoring and Advisory Service SLOW QUERIES The slow query log is enabled. Current long_query_time = 3.000000 sec. You have 1158 out of 67734355 that take longer than 3.000000 sec. to complete Your long_query_time seems to be fine BINARY UPDATE LOG The binary update log is NOT enabled. You will not be able to do point in time recovery See http://dev.mysql.com/doc/refman/5.1/en/point-in-time-recovery.html WORKER THREADS Current thread_cache_size = 8 Current threads_cached = 6 Current threads_per_sec = 0 Historic threads_per_sec = 0 Your thread_cache_size is fine MAX CONNECTIONS Current max_connections = 600 Current threads_connected = 156 Historic max_used_connections = 289 The number of used connections is 48% of the configured maximum. Your max_connections variable seems to be fine. INNODB STATUS Current InnoDB index space = 75 M Current InnoDB data space = 147 M Current InnoDB buffer pool free = 30 % Current innodb_buffer_pool_size = 250 M Depending on how much space your innodb indexes take up it may be safe to increase this value to up to 2 / 3 of total system memory MEMORY USAGE Max Memory Ever Allocated : 4.42 G Configured Max Per-thread Buffers : 7.21 G Configured Max Global Buffers : 978 M Configured Max Memory Limit : 4.16 G Physical Memory : 5.21 G KEY BUFFER Current MyISAM index space = 416 M Current key_buffer_size = 600 M Key cache miss rate is 1 : 6013 Key buffer free ratio = 38 % Your key_buffer_size seems to be too high. Perhaps you can use these resources elsewhere QUERY CACHE Query cache is enabled Current query_cache_size = 100 M Current query_cache_used = 31 M Current query_cache_limit = 20 M Current Query cache Memory fill ratio = 31.97 % Current query_cache_min_res_unit = 4 K Query Cache is 32 % fragmented Run "FLUSH QUERY CACHE" periodically to defragment the query cache memory If you have many small queries lower 'query_cache_min_res_unit' to reduce fragme ntation. MySQL won't cache query results that are larger than query_cache_limit in size SORT OPERATIONS Current sort_buffer_size = 2 M Current read_rnd_buffer_size = 8 M Sort buffer seems to be fine JOINS Current join_buffer_size = 132.00 K You have had 1433 queries where a join could not use an index properly You should enable "log-queries-not-using-indexes" Then look for non indexed joins in the slow query log. If you are unable to optimize your queries you may want to increase your join_buffer_size to accommodate larger joins in one pass. Note! This script will still suggest raising the join_buffer_size when ANY joins not using indexes are found. OPEN FILES LIMIT Current open_files_limit = 3000 files The open_files_limit should typically be set to at least 2x-3x that of table_cache if you have heavy MyISAM usage. Your open_files_limit value seems to be fine TABLE CACHE Current table_open_cache = 512 tables Current table_definition_cache = 256 tables You have a total of 72 tables You have 427 open tables. The table_cache value seems to be fine TEMP TABLES Current max_heap_table_size = 64 M Current tmp_table_size = 64 M Of 131907 temp tables, 29% were created on disk Perhaps you should increase your tmp_table_size and/or max_heap_table_size to reduce the number of disk-based temporary tables Note! BLOB and TEXT columns are not allow in memory tables. If you are using these columns raising these values might not impact your ratio of on disk temp tables. TABLE SCANS Current read_buffer_size = 2 M Current table scan ratio = 84 : 1 read_buffer_size seems to be fine TABLE LOCKING Current Lock Wait ratio = 1 : 1407 You may benefit from selective use of InnoDB. MySQLTuner Citar MySQLTuner is a high-performance MySQL tuning script written in perl that will provide you with a snapshot of a MySQL servers health. Based on the statistics gathered, specific recommendations will be provided that will increase a MySQL servers efficiency and performance. The script gives you automated MySQL tuning that is on the level of what you would receive from a MySQL DBA. Perl Script http://mysqltuner.com/mysqltuner.pl Features: * Memory Usage: Calculates MySQL memory usage at max load and makes recommendations for increasing or decreasing the MySQL memory footprint. Per-thread and server-wide buffer data is calculated separately for an accurate snapshot of the servers configuration. * Slow Queries: Reviews the amount of slow queries relative to the total queries. Slow query time limits are also analyzed and recommendations are made. * Connections: Current and historical connection counts are reviewed. * Key Buffer: Takes configuration data and compares it to the actual indexes found in MyISAM tables. Key cache hit rates are calculated and variable adjustments are suggested. * Query Cache: Query cache hit rates and usage percentages are used to make recommendations for the query cache configuration variables. * Sorting & Joins: Per-thread buffers that affect sorts and joins are reviewed along with the statistics from the queries run against the server. * Temporary Tables: Variable recommendations are made to reduce temporary tables that are written to the disk. * Table Cache: Compares total tables opened to the currently open tables. Calculates the table cache hit rate in order to make suggestions. * Open Files: Determines if the server will approach or run into the open file limit set by the operating system or the MySQL server itself. * Table Locks: Finds table locking that forces queries to wait and makes suggestions for reducing locks that require a wait. * Thread Cache: Calculates how many times MySQL must create a new thread to respond to a query. * Aborted Connections: Finds applications that are not closing connections to MySQL properly. * Read/Write Ratios: Calculates the percentage of read and write operations on your MySQL installation. Usage: # ./mysqltuner.pl --help MySQLTuner 0.9.0 - MySQL High Performance Tuning Script Bug reports, feature requests, and downloads at http://mysqltuner.com/ Maintained by Major Hayden (major@mhtx.net) Important Usage Guidelines: To run the script with the default options, run the script without arguments Allow MySQL server to run for at least 24-48 hours before trusting suggestions Some routines may require root level privileges (script will provide warnings) Performance and Reporting Options --skipsize Don't enumerate tables and their types/sizes (Recommended for servers with many tables) --skipversion Don't check for updates to MySQLTuner Output Options: --nogood Remove OK responses --nobad Remove negative/suggestion responses --noinfo Remove informational responses --nocolor Don't print output in color Here is a sample of the scripts output on a well optimized server: >> MySQLTuner 0.9.0 - Major Hayden >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with help for additional options and output filtering General Statistics [OK] You have the latest version of MySQLTuner [OK] Currently running supported MySQL version 5.0.51a-log [OK] Operating on 64-bit architecture Storage Engine Statistics - [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 491M (Tables: 1424) [--] Data in InnoDB tables: 9M (Tables: 151) Performance Metrics - [--] Up for: 19d 16h 14m 3s (57M q [33.636 qps], 5M conn, TX: 185B, RX: 5B) [--] Reads / Writes: 77% / 23% [--] Total buffers: 2.7M per thread and 606.0M global [OK] Maximum possible memory usage: 743.5M (37% of installed RAM) [OK] Slow queries: 0% (81/57M) [!!] Highest connection usage: 100% (51/50) [OK] Key buffer size / total MyISAM indexes: 256.0M/210.9M [OK] Key buffer hit rate: 99.3% [OK] Query cache efficiency: 71.4% [!!] Query cache prunes per day: 2752 [OK] Sorts requiring temporary tables: 0% [OK] Temporary tables created on disk: 2% [OK] Thread cache hit rate: 99% [!!] Table cache hit rate: 2% [OK] Open file limit used: 4% [OK] Table locks acquired immediately: 99% [OK] InnoDB data size / buffer pool: 9.8M/50.0M Recommendations General recommendations: Reduce or eliminate persistent connections to reduce connection usage Increase table_cache gradually to avoid file descriptor limits Variables to adjust: max_connections (> 50) wait_timeout (< 15) interactive_timeout (< 15) query_cache_size (> 256M) table_cache (> 4096) mysqlreport Citar mysqlreport makes a friendly report of important MySQL status values. mysqlreport transforms the values from SHOW STATUS into an easy-to-read report that provides an in-depth understanding of how well MySQL is running. mysqlreport is a better alternative (and practically the only alternative) to manually interpreting SHOW STATUS. Descargar Perl Script http://hackmysql.com/scripts/mysqlreport http://tag1consulting.com/MySQL_Monitoring_and_Tuning Código
Título: Re: Herramientas para Optimizar MySQL Publicado por: Rojodos en 2 Agosto 2011, 19:19 pm Interesante, tengo varios servidores con CRMs y MySQLs que me estan dando problemas....
Título: Re: Herramientas para Optimizar MySQL Publicado por: folostia en 23 Octubre 2011, 14:22 pm muy bueno,gracias por el aporte ;)
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