{"id":203,"date":"2013-11-16T00:09:00","date_gmt":"2013-11-15T15:09:00","guid":{"rendered":"http:\/\/tech.akat.info\/?p=203"},"modified":"2014-09-16T01:14:02","modified_gmt":"2014-09-15T16:14:02","slug":"%e3%80%90mysql%e3%80%91%e3%83%81%e3%83%a5%e3%83%bc%e3%83%8b%e3%83%b3%e3%82%b0%e7%94%a8%e3%83%84%e3%83%bc%e3%83%ab","status":"publish","type":"post","link":"https:\/\/tech.akat.info\/?p=203","title":{"rendered":"\u3010Mysql\u3011\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u7528\u30c4\u30fc\u30eb"},"content":{"rendered":"

\u305d\u306e\u524d\u306b<\/h1>\n

\u5fc5\u8981\u306b\u5fdc\u3058\u3066 RESET QUERY CACHE \u30b3\u30de\u30f3\u30c9\u3092\u5229\u7528\u3057\u3066\u30af\u30a8\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u524a\u9664\u3059\u308b\u3079\u3057<\/p>\n

\r\nmysql> RESET QUERY CACHE;\r\nQuery OK, 0 rows affected (0.00 sec)\r\n<\/pre>\n
MySQLTuner<\/h1>\n
\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b\u30c4\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u30b5\u30fc\u30d0\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6982\u89b3\u3092\u8868\u793a\u3057\u3001\u63a8\u5968\u8a2d\u5b9a\u3092\u63d0\u793a\u3057\u3066\u304f\u308c\u308b\u30c4\u30fc\u30eb<\/p>\n
\r\ncd \/usr\/local\/src\/\r\nwget -d https:\/\/github.com\/major\/MySQLTuner-perl\/archive\/master.zip\r\nunzip master.zip\r\ncd MySQLTuner-perl-master\/\r\n.\/mysqltuner.pl\r\n<\/pre>\n
\r\n &gt;&gt;  MySQLTuner 1.2.0 - Major Hayden &lt;major@mhtx.net&gt;\r\n &gt;&gt;  Bug reports, feature requests, and downloads at http:\/\/mysqltuner.com\/\r\n &gt;&gt;  Run with '--help' for additional options and output filtering\r\n[OK] Logged in using credentials from debian maintenance account.\r\n\r\n-------- General Statistics --------------------------------------------------\r\n[--] Skipped version check for MySQLTuner script\r\n[OK] Currently running supported MySQL version 5.5.34-0ubuntu0.12.04.1-log\r\n[OK] Operating on 64-bit architecture\r\n\r\n-------- Storage Engine Statistics -------------------------------------------\r\n[--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster\r\n[--] Data in MyISAM tables: 56B (Tables: 11)\r\n[--] Data in InnoDB tables: 4M (Tables: 100)\r\n[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)\r\n[!!] Total fragmented tables: 100\r\n\r\n-------- Security Recommendations  -------------------------------------------\r\n[OK] All database users have passwords assigned\r\n\r\n-------- Performance Metrics -------------------------------------------------\r\n[--] Up for: 11d 22h 54m 56s (95K q [0.092 qps], 3K conn, TX: 224M, RX: 14M)\r\n[--] Reads \/ Writes: 81% \/ 19%\r\n[--] Total buffers: 192.0M global + 2.7M per thread (151 max threads)\r\n[OK] Maximum possible memory usage: 597.8M (60% of installed RAM)\r\n[OK] Slow queries: 1% (1K\/95K)\r\n[OK] Highest usage of available connections: 1% (2\/151)\r\n[OK] Key buffer size \/ total MyISAM indexes: 16.0M\/125.0K\r\n[!!] Key buffer hit rate: 94.6% (368 cached \/ 20 reads)\r\n[OK] Query cache efficiency: 69.6% (50K cached \/ 71K selects)\r\n[OK] Query cache prunes per day: 0\r\n[OK] Sorts requiring temporary tables: 0% (0 temp sorts \/ 2K sorts)\r\n[!!] Temporary tables created on disk: 34% (1K on disk \/ 3K total)\r\n[OK] Thread cache hit rate: 99% (2 created \/ 3K connections)\r\n[OK] Table cache hit rate: 28% (285 open \/ 998 opened)\r\n[OK] Open file limit used: 10% (107\/1K)\r\n[OK] Table locks acquired immediately: 100% (29K immediate \/ 29K locks)\r\n[OK] InnoDB data size \/ buffer pool: 4.6M\/128.0M\r\n\r\n-------- Recommendations -----------------------------------------------------\r\nGeneral recommendations:\r\n    Run OPTIMIZE TABLE to defragment tables for better performance\r\n    When making adjustments, make tmp_table_size\/max_heap_table_size equal\r\n    Reduce your SELECT DISTINCT queries without LIMIT clauses\r\nVariables to adjust:\r\n    tmp_table_size (&gt; 16M)\r\n    max_heap_table_size (&gt; 16M)\r\n[bash]\r\n\r\n[!!]\u3068\u51fa\u3066\u3044\u308b\u884c\u304c\u8b66\u544a\u3067\u3001\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u6539\u5584\u304c\u5fc5\u8981\u306a\u7b87\u6240\u304c\u63d0\u793a\u3055\u308c\u308b\r\n\u307e\u305f--host &lt;hostname&gt; \u3067\u30ea\u30e2\u30fc\u30c8\u30db\u30b9\u30c8\u306b\u63a5\u7d9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\r\n\r\n&lt;h1&gt;\u65e2\u5b58\u30c4\u30fc\u30eb\u3067\u72b6\u6cc1\u78ba\u8a8d&lt;\/h1&gt;\r\nMySQL\u306e\u7a3c\u50cd\u7dcf\u6642\u9593\u3084\u958b\u304b\u308c\u3066\u3044\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u6570\u3092\u8abf\u3079\u308b\r\n[bash]\r\nmysqladmin -uroot -pXXXXXXXXX status\r\nUptime: 1036930  Threads: 1  Questions: 96337  Slow queries: 1550  Opens: 998  Flush tables: 1  Open tables: 285  Queries per second avg: 0.092\r\n<\/pre>\n
\u3088\u308a\u8a73\u7d30\u306b\u77e5\u308a\u305f\u3044\u5834\u5408\u306f
\nmysqladmin -uroot -pXXXXXXXXX extended-status | lv<\/p>\n
mysqlslap<\/h1>\n
\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8ca0\u8377\u30a8\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3
\nmysqlslap\u306f\u30c6\u30b9\u30c8\u3092\u958b\u59cb\u3059\u308b\u3068\u5171\u306bmysqlsap\u3068\u3044\u3046\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068t1\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u3092\u81ea\u52d5\u4f5c\u6210\u3057\u3001\u30c6\u30b9\u30c8\u304c\u5b8c\u4e86\u3059\u308b\u3068\u524a\u9664\u3059\u308b<\/p>\n
\r\nroot@hostname:\/home\/admin# mysqlslap --version\r\nmysqlslap  Ver 1.0 Distrib 5.5.39-MariaDB, for debian-linux-gnu (x86_64)\r\nroot@hostname:\/home\/admin# mysqlslap --no-defaults --auto-generate-sql --engine=innodb --auto-generate-sql-write-number=1000 --concurrency=100 --auto-generate-sql-execute-number=100 --auto-generate-sql-load-type=read --iterations=3 --user=root --password=password\r\nBenchmark\r\n        Running for engine innodb\r\n        Average number of seconds to run all queries: 19.531 seconds\r\n        Minimum number of seconds to run all queries: 19.407 seconds\r\n        Maximum number of seconds to run all queries: 19.776 seconds\r\n        Number of clients running queries: 100\r\n        Average number of queries per client: 100\r\n<\/pre>\n\n\n\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
--no-defaults<\/td>my.cnf \u306b\u66f8\u304b\u308c\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u7121\u8996\u3059\u308b\u3002\u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u5148\u982d\u306b\u4ed8\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b<\/td>\n<\/tr>\n
--auto-generate-sql<\/td>\u30d5\u30a1\u30a4\u30eb\u3084\u30b3\u30de\u30f3\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ecb\u3057\u3066\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001SQL\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u81ea\u52d5\u7684\u306b\u751f\u6210\u3059\u308b<\/td>\n<\/tr>\n
--auto-generate-sql-guid-primary<\/td>GUID\u30d9\u30fc\u30b9\u306e\u4e3b\u30ad\u30fc\u30ab\u30e9\u30e0\u3092\u4f5c\u6210\u3059\u308b<\/td>\n<\/tr>\n
--engine<\/td>\u30b9\u30c8\u30ec\u30fc\u30b8\u30a8\u30f3\u30b8\u30f3\u3092\u6307\u5b9a\u3059\u308b<\/td>\n<\/tr>\n
--auto-generate-sql-write-number<\/td>\u5404\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3059\u308bINSERT\u56de\u6570\u3092\u6307\u5b9a\u3059\u308b(\u30c7\u30d5\u30a9\u30eb\u30c8100)
\n--no-drop\u3067\u78ba\u8a8d\u3057\u305f\u3068\u3053\u308d\u3001t1\u306e\u30ec\u30b3\u30fc\u30c9\u683c\u7d0d\u6570<\/td>\n<\/tr>\n
--concurrency<\/td>\u540c\u6642\u63a5\u7d9a\u6570<\/td>\n<\/tr>\n
--auto-generate-sql-execute-number<\/td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u6bce\u306b\u767a\u884c\u3059\u308bSQL\u30af\u30a8\u30ea\u6570\u3092\u6307\u5b9a\u3059\u308b\u3002concurrency\u3068\u306e\u7a4d\u304c\u5b9f\u884c\u3055\u308c\u308b\u5168\u30af\u30a8\u30ea\u6570<\/td>\n<\/tr>\n
--auto-generate-sql-load-type<\/td>\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3002read (scan tables), write (insert into tables), key (read primary keys), update (update primary keys), or mixed (half inserts, half scanning selects)<\/td>\n<\/tr>\n
--iterations<\/td>\u5b9f\u884c\u3059\u308b\u30c6\u30b9\u30c8\u306e\u56de\u6570<\/td>\n<\/tr>\n
--number-int-cols<\/td>\u30c6\u30b9\u30c8\u30c6\u30fc\u30d6\u30eb\u306b\u4f5c\u308b INT \u578b\u30ab\u30e9\u30e0\u306e\u6570<\/td>\n<\/tr>\n
--number-char-cols<\/td>\u30c6\u30b9\u30c8\u30c6\u30fc\u30d6\u30eb\u306b\u4f5c\u308b VARCHAR \u578b\u30ab\u30e9\u30e0\u306e\u6570<\/td>\n<\/tr>\n
--no-drop<\/td>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u7d42\u4e86\u6642\u3001\u4f5c\u6210\u3057\u305f\u30b9\u30ad\u30fc\u30de\u3092\u524a\u9664\u3057\u306a\u3044\u3001\u3069\u3093\u306a\u30c6\u30fc\u30d6\u30eb\u3067\u691c\u8a3c\u3057\u305f\u304b\u78ba\u8a8d\u3067\u304d\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n
\u2605query\u3092\u6307\u5b9a\u3067\u304d\u308b\uff1f
\nhttp:\/\/hack.aipo.com\/archives\/2959\/<\/p>\n
tcpdump\u3067SQL\u8aad\u307f\u53d6\u308a\u53ef\u80fd\uff1f<\/p>\n
DBT2
\nSysBench
\nsupesmack
\nmybench<\/p>\n
\u30b7\u30f3\u30d7\u30eb\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u304c\u66f8\u304b\u308c\u3066\u3044\u308b<\/h1>\n
http:\/\/www.powercms.jp\/blog\/2012\/10\/mysqlinnodb.html
\nhttp:\/\/thinkit.co.jp\/free\/article\/0707\/2\/4\/<\/p>\n
\u3088\u3080\u3079\u3057<\/h1>\n
http:\/\/www.gashimax.com\/wiki\/index.php?MySQL%2F%A5%C1%A5%E5%A1%BC%A5%CB%A5%F3%A5%B0<\/p>\n
SHOW STATUS<\/h1>\n
http:\/\/rfs.jp\/sb\/sql\/s03\/07-8.html<\/p>\n
ORACLE\u304c\u958b\u767a\u3057\u305f\u8ca0\u8377\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3002\u73fe\u5728\u958b\u767a\u7d42\u4e86\u3002\u4f7f\u3046\uff1f<\/h1>\n
http:\/\/www.multiburst.net\/sometime-php\/2009\/06\/transaction-generator\/<\/p>\n
mysqldumpslow<\/h1>\n
slow query\u3092ExPLAIN\u3067\u89e3\u6790<\/h1>\n
slow query \u51fa\u529b\u65b9\u6cd5<\/h2>\n
\r\nmysql> show variables like 'slow_query%';\r\n+---------------------+---------------------------------+\r\n| Variable_name       | Value                           |\r\n+---------------------+---------------------------------+\r\n| slow_query_log      | OFF                             |\r\n| slow_query_log_file | \/var\/log\/mysql\/mariadb-slow.log |\r\n+---------------------+---------------------------------+\r\n2 rows in set (0.00 sec)\r\n\r\nmysql> show variables like 'long_query%';\r\n+-----------------+-----------+\r\n| Variable_name   | Value     |\r\n+-----------------+-----------+\r\n| long_query_time | 10.000000 | \r\n+-----------------+-----------+\r\n1 row in set (0.00 sec)\r\n\r\nmysql> show variables like 'log_queries%';\r\n+-------------------------------+-------+\r\n| Variable_name                 | Value |\r\n+-------------------------------+-------+\r\n| log_queries_not_using_indexes | OFF   |\r\n+-------------------------------+-------+\r\n1 row in set (0.00 sec)\r\n\r\nmysql> set global slow_query_log = 1;\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\nmysql> set global long_query_time = 0.01; # \u5b9f\u884c\u306b0.01\u79d2\u304b\u304b\u3063\u305fSQL\u6587\u3092\u51fa\u529b\u30020\u3092\u6307\u5b9a\u3059\u308b\u3068\u3059\u3079\u3066\u306e\u30af\u30a8\u30ea\u304c\u51fa\u529b\u3059\u308b\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\nmysql> set global log_queries_not_using_indexes = 1; # \u30d5\u30eb\u30b9\u30ad\u30e3\u30f3(\u5168\u4ef6\u691c\u7d22(SELECT * FROM)\u3001\u5168\u7d22\u5f15\u691c\u7d22(SELECT COUNT (*) FROM ))\u3057\u305fSQL\u6587\u3092\u5b9f\u884c\u6642\u9593\u306b\u304b\u304b\u308f\u3089\u305a\u51fa\u529b\u3059\u308b\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\n<\/pre>\n
EXPLAIN<\/h2>\n
\u5b9f\u884c\u8a08\u753b(index\u3092\u4f7f\u3046\u304b\u3001\u3069\u306eindex\u3092\u4f7f\u3046\u304b)\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u69cb\u6587
\n\"2014-07-22_231935\"<\/a><\/p>\n
\u6b21\u306e\u30af\u30a8\u30ea\u3092\u6539\u5584\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/p>\n