{"id":120254,"date":"2026-10-31T09:16:55","date_gmt":"2026-10-31T01:16:55","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/120254.html"},"modified":"2026-10-31T09:16:55","modified_gmt":"2026-10-31T01:16:55","slug":"04_mysql-dba-%e6%97%a5%e5%b8%b8%e8%bf%90%e7%bb%b4%e6%89%8b%e5%86%8c-%e4%bc%9a%e8%af%9d%e7%ae%a1%e7%90%86%e3%80%81%e9%94%81%e4%b8%8e%e9%98%bb%e5%a1%9e%e3%80%81%e4%ba%8b%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/120254.html","title":{"rendered":"04_MySQL DBA \u65e5\u5e38\u8fd0\u7ef4\u624b\u518c \u2014\u2014 \u4f1a\u8bdd\u7ba1\u7406\u3001\u9501\u4e0e\u963b\u585e\u3001\u4e8b\u52a1\u76d1\u63a7\u3001\u6162\u67e5\u8be2\u4e0e\u65e5\u5fd7\u5de1\u68c0"},"content":{"rendered":"

04_MySQL DBA \u65e5\u5e38\u8fd0\u7ef4\u624b\u518c \u2014\u2014 \u4f1a\u8bdd\u7ba1\u7406\u3001\u9501\u4e0e\u963b\u585e\u3001\u4e8b\u52a1\u76d1\u63a7\u3001\u6162\u67e5\u8be2\u4e0e\u65e5\u5fd7\u5de1\u68c0<\/h2>\n

\u7cfb\u5217\u5b9a\u4f4d：\u300aMySQL \u6570\u636e\u5e93\u5168\u6808\u8fd0\u7ef4\u5b9e\u6218\u7cfb\u5217\u300b\u7b2c 04 \u7bc7，\u4e0e\u300aOracle \u6570\u636e\u5e93\u5168\u6808\u8fd0\u7ef4\u5b9e\u6218\u7cfb\u5217（VMware \u7248）\u300b\u540c\u6784\u5bf9\u6807\u3002\u9002\u7528\u7248\u672c：MySQL 8.0（5.7 \u5dee\u5f02\u968f\u6587\u6807\u6ce8）\u3002\u5b98\u65b9\u6587\u6863：MySQL 8.0 Reference Manual\u3001Server Status Variables \/ InnoDB Locking \/ The Slow Query Log\u3002<\/p>\n

\n

\u4e00\u3001\u65e5\u5e38\u8fd0\u7ef4\u5168\u666f（DBA \u6bcf\u65e5\u6e05\u5355）<\/h3>\n<\/p>\n

\"\u56fe<\/p>\n

\u56fe 1<\/p>\n<\/p>\n

\"\u56fe<\/p>\n

\u56fe 2<\/p>\n<\/p>\n\n\u5217\u8bf4\u660e\u7c7b\u6bd4 Oracle<\/tr>\n\n\n\n\n\n\n\n\n\n
Id<\/td>\n\u8fde\u63a5\u7ebf\u7a0b ID<\/td>\nsid\/serial#<\/td>\n<\/tr>\n
User<\/td>\n\u7528\u6237\u540d<\/td>\nusername<\/td>\n<\/tr>\n
Host<\/td>\n\u5ba2\u6237\u7aef IP:\u7aef\u53e3<\/td>\nmachine<\/td>\n<\/tr>\n
db<\/td>\n\u5f53\u524d\u6570\u636e\u5e93<\/td>\nschema<\/td>\n<\/tr>\n
Command<\/td>\nSleep\/Query\/Connect \u7b49<\/td>\nstatus<\/td>\n<\/tr>\n
Time<\/td>\n\u5f53\u524d\u72b6\u6001\u6301\u7eed\u79d2\u6570<\/td>\nseconds_in_wait<\/td>\n<\/tr>\n
State<\/td>\n\u8be6\u7ec6\u72b6\u6001<\/td>\nevent<\/td>\n<\/tr>\n
Info<\/td>\n\u6b63\u5728\u6267\u884c\u7684 SQL<\/td>\nsql_text<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2.2 \u8fde\u63a5\u6570\u76d1\u63a7\u4e0e\u5904\u7406<\/h4>\n<\/p>\n

— \u89e3\u91ca：\u5f53\u524d\u8fde\u63a5\u6570 \/ \u6700\u5927\u8fde\u63a5\u6570
\nSHOW VARIABLES LIKE 'max_connections'; — \u4e0a\u9650
\nSHOW STATUS LIKE 'Threads_connected'; — \u5f53\u524d\u8fde\u63a5\u6570
\nSHOW STATUS LIKE 'Threads_running'; — \u6d3b\u8dc3（\u6b63\u5728\u6267\u884c）\u7ebf\u7a0b\u6570<\/p>\n

— \u89e3\u91ca：\u6740\u6389\u7a7a\u95f2\u8fde\u63a5（Sleep \u72b6\u6001\u8d85\u8fc7 N \u79d2）
\n— \u6ce8\u610f：KILL \u662f\u5f02\u6b65\u7684，\u4e0d\u4f1a\u7acb\u5373\u7ec8\u6b62
\nKILL 12345; — \u89e3\u91ca：\u6309 Id \u6740\u8fde\u63a5<\/p>\n

— \u6279\u91cf\u6740 Sleep \u8fde\u63a5（\u751f\u6210 SQL）
\nSELECT CONCAT('KILL ', id, ';') AS kill_sql
\nFROM information_schema.PROCESSLIST
\nWHERE COMMAND = 'Sleep' AND TIME > 600; — \u7a7a\u95f2\u8d85\u8fc7 10 \u5206\u949f<\/p>\n

\u751f\u4ea7\u5efa\u8bae：- wait_timeout=28800（8 \u5c0f\u65f6，\u9ed8\u8ba4）\u2192 \u5efa\u8bae\u6539\u4e3a 600（10 \u5206\u949f），\u914d\u5408\u5e94\u7528\u4fa7\u8fde\u63a5\u6c60\u3002- \u8fde\u63a5\u6570\u6253\u6ee1\u62a5 ERROR 1040 (08004): Too many connections：\u5148\u67e5\u5e94\u7528\u4fa7\u8fde\u63a5\u6c60\u914d\u7f6e，\u518d\u8003\u8651\u8c03\u5927 max_connections\u3002<\/p>\n

\n

\u4e09\u3001\u9501\u4e0e\u963b\u585e\u6392\u67e5（\u5b98\u65b9：InnoDB Locking）<\/h3>\n<\/p>\n

\"\u56fe<\/p>\n

\u56fe 3<\/p>\n<\/p>\n

3.1 \u9501\u7c7b\u578b\u4f53\u7cfb<\/h4>\n<\/p>\n

\"\u56fe<\/p>\n

\u56fe 4<\/p>\n<\/p>\n\n\u9501\u7c7b\u578b\u8bf4\u660e\u7c7b\u6bd4 Oracle<\/tr>\n\n\n\n\n\n\n
Record Lock<\/td>\n\u9501\u5b9a\u5355\u884c\u8bb0\u5f55<\/td>\nrow lock<\/td>\n<\/tr>\n
Gap Lock<\/td>\n\u9501\u5b9a\u7d22\u5f15\u95f4\u9699，\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u63d2\u5165<\/td>\n\u95f4\u9699\u9501<\/td>\n<\/tr>\n
Next-Key Lock<\/td>\nRecord + Gap，InnoDB RR \u9694\u79bb\u7ea7\u522b\u9ed8\u8ba4<\/td>\n\u4e34\u952e\u9501<\/td>\n<\/tr>\n
\u610f\u5411\u9501<\/td>\n\u8868\u7ea7，\u6807\u8bc6\u672c\u4e8b\u52a1\u8981\u52a0\u4ec0\u4e48\u884c\u9501<\/td>\nTM \u9501<\/td>\n<\/tr>\n
AUTO-INC Lock<\/td>\n\u81ea\u589e ID \u5206\u914d\u65f6\u7684\u8868\u7ea7\u9501<\/td>\nsequence lock<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3.2 \u6392\u67e5\u963b\u585e\u94fe<\/h4>\n<\/p>\n

— \u89e3\u91ca：8.0 \u67e5\u770b\u5f53\u524d\u6240\u6709\u9501（performance_schema.data_locks）
\nSELECT * FROM performance_schema.data_locks\\\\G<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u9501\u7b49\u5f85\u5173\u7cfb（\u8c01\u5728\u7b49\u8c01）
\nSELECT * FROM performance_schema.data_lock_waits\\\\G<\/p>\n

— \u89e3\u91ca：\u7efc\u5408\u89c6\u56fe：\u8c01\u963b\u585e\u4e86\u8c01（sys schema \u5c01\u88c5）
\nSELECT * FROM sys.innodb_lock_waits\\\\G<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u5f53\u524d\u6d3b\u8dc3\u4e8b\u52a1
\nSELECT trx_id, trx_state, trx_started, trx_mysql_thread_id,
\n trx_query, trx_rows_locked, trx_rows_modified
\nFROM information_schema.innodb_trx
\nORDER BY trx_started ASC;<\/p>\n

\"\u56fe<\/p>\n

\u56fe 5<\/p>\n<\/p>\n

3.3 \u5904\u7406\u963b\u585e<\/h4>\n<\/p>\n

— \u89e3\u91ca：\u627e\u5230\u963b\u585e\u6e90\u5934（trx_mysql_thread_id \u5c31\u662f SHOW PROCESSLIST \u7684 Id）
\n— \u5728 innodb_lock_waits \u4e2d：
\n— requesting_engine_lock_id = \u7b49\u5f85\u65b9
\n— blocking_engine_lock_id = \u963b\u585e\u65b9<\/p>\n

— \u89e3\u91ca：\u6740\u6389\u963b\u585e\u6e90\u5934（\u8c28\u614e！\u5148\u786e\u8ba4\u4e1a\u52a1\u5f71\u54cd）
\nKILL <blocking_thread_id>;<\/p>\n

— \u89e3\u91ca：\u9501\u7b49\u5f85\u8d85\u65f6\u8bbe\u7f6e
\nSHOW VARIABLES LIKE 'innodb_lock_wait_timeout'; — \u9ed8\u8ba4 50 \u79d2
\nSET GLOBAL innodb_lock_wait_timeout = 10; — \u751f\u4ea7\u5efa\u8bae 10 \u79d2\u5feb\u901f\u5931\u8d25<\/p>\n

5.7 \u5dee\u5f02：5.7 \u7528 information_schema.INNODB_LOCKS \u548c INNODB_LOCK_WAITS \u89c6\u56fe；8.0 \u8fc1\u79fb\u5230 performance_schema.data_locks \u548c data_lock_waits，\u4fe1\u606f\u66f4\u8be6\u7ec6\u3002<\/p>\n

\n

\u56db\u3001\u4e8b\u52a1\u76d1\u63a7<\/h3>\n<\/p>\n

— \u89e3\u91ca：\u5f53\u524d\u6240\u6709\u4e8b\u52a1
\nSELECT trx_id, trx_state, trx_started,
\n TIMESTAMPDIFF(SECOND, trx_started, NOW()) AS trx_age_sec,
\n trx_mysql_thread_id, trx_query
\nFROM information_schema.innodb_trx
\nORDER BY trx_started;<\/p>\n

— \u89e3\u91ca：\u67e5\u627e\u957f\u4e8b\u52a1（\u8fd0\u884c\u8d85\u8fc7 60 \u79d2）
\nSELECT trx_id, trx_started,
\n TIMESTAMPDIFF(SECOND, trx_started, NOW()) AS age_sec,
\n trx_query, trx_mysql_thread_id
\nFROM information_schema.innodb_trx
\nWHERE TIME_TO_SEC(TIMEDIFF(NOW(), trx_started)) > 60
\nORDER BY trx_started;<\/p>\n

— \u89e3\u91ca：\u672a\u63d0\u4ea4\u4e8b\u52a1（\u5bfc\u81f4 undo \u81a8\u80c0 + \u9501\u4e0d\u91ca\u653e）
\nSELECT * FROM information_schema.innodb_trx
\nWHERE trx_state = 'RUNNING' AND trx_rows_modified > 0;<\/p>\n\n\u4e8b\u52a1\u5f02\u5e38\u5371\u5bb3\u5904\u7406<\/tr>\n\n\n\n\n
\u957f\u4e8b\u52a1（>5 \u5206\u949f）<\/td>\nundo \u81a8\u80c0\u3001\u9501\u4e0d\u91ca\u653e\u3001purge \u6ede\u540e<\/td>\n\u5b9a\u4f4d\u5e94\u7528，\u5fc5\u8981\u65f6 KILL<\/td>\n<\/tr>\n
\u672a\u63d0\u4ea4\u4e8b\u52a1<\/td>\n\u8fde\u63a5 Sleep \u4f46\u4e8b\u52a1\u6ca1 commit<\/td>\n\u68c0\u67e5\u5e94\u7528\u662f\u5426\u5fd8\u8bb0 commit<\/td>\n<\/tr>\n
\u5927\u4e8b\u52a1<\/td>\n\u4e3b\u4ece\u5ef6\u8fdf\u5927\u3001binlog \u4f53\u79ef\u5927<\/td>\n\u62c6\u5c0f\u4e8b\u52a1，\u5206\u6279\u63d0\u4ea4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e94\u3001\u6162\u67e5\u8be2\u65e5\u5fd7（\u5b98\u65b9：The Slow Query Log）<\/h3>\n

5.1 \u914d\u7f6e<\/h4>\n<\/p>\n

# my.cnf \u6162\u67e5\u8be2\u914d\u7f6e
\nslow_query_log = ON
\nslow_query_log_file = \/data\/mysql\/slow.log
\nlong_query_time = 1 # \u8d85\u8fc7 1 \u79d2\u8bb0\u5f55
\nlog_queries_not_using_indexes = ON # \u6ca1\u8d70\u7d22\u5f15\u7684\u4e5f\u8bb0\u5f55
\nlog_slow_admin_statements = ON # \u7ba1\u7406\u8bed\u53e5（ALTER\/CREATE）\u4e5f\u8bb0\u5f55
\nmin_examined_row_limit = 100 # \u626b\u63cf\u884c\u6570\u4f4e\u4e8e 100 \u4e0d\u8bb0\u5f55<\/p>\n

5.2 \u5206\u6790\u6162\u67e5\u8be2<\/h4>\n<\/p>\n

# \u89e3\u91ca：mysqldumpslow \u662f MySQL \u81ea\u5e26\u7684\u6162\u67e5\u8be2\u5206\u6790\u5de5\u5177
\n# -s t \u6309\u603b\u65f6\u95f4\u6392\u5e8f，-s c \u6309\u6b21\u6570\u6392\u5e8f
\n# -t 10 \u53d6 Top 10
\nmysqldumpslow -s t -t 10 \/data\/mysql\/slow.log<\/p>\n

# \u89e3\u91ca：\u66f4\u5f3a\u5927\u7684\u5de5\u5177 pt-query-digest（Percona Toolkit）
\npt-query-digest \/data\/mysql\/slow.log | less<\/p>\n\n\u5de5\u5177\u8bf4\u660e<\/tr>\n\n\n\n\n
mysqldumpslow<\/td>\nMySQL \u81ea\u5e26，\u57fa\u7840\u7edf\u8ba1<\/td>\n<\/tr>\n
pt-query-digest<\/td>\nPercona Toolkit，\u6df1\u5ea6\u5206\u6790，\u751f\u4ea7\u63a8\u8350<\/td>\n<\/tr>\n
explain<\/td>\n\u5bf9\u5355\u6761\u6162 SQL \u770b\u6267\u884c\u8ba1\u5212<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

— \u89e3\u91ca：performance_schema \u4e5f\u53ef\u4ee5\u770b\u6162 SQL \u6c47\u603b（\u65e0\u9700\u8bfb\u65e5\u5fd7）
\nSELECT DIGEST_TEXT, COUNT_STAR,
\n ROUND(SUM_TIMER_WAIT\/1000000000000, 2) AS total_sec,
\n ROUND(AVG_TIMER_WAIT\/1000000000000, 2) AS avg_sec,
\n SUM_ROWS_EXAMINED
\nFROM performance_schema.events_statements_summary_by_digest
\nORDER BY SUM_TIMER_WAIT DESC
\nLIMIT 10\\\\G<\/p>\n

\n

\u516d\u3001\u9519\u8bef\u65e5\u5fd7\u4e0e\u5e38\u89c4\u65e5\u5fd7<\/h3>\n

6.1 \u9519\u8bef\u65e5\u5fd7<\/h4>\n<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u9519\u8bef\u65e5\u5fd7\u8def\u5f84
\nSHOW VARIABLES LIKE 'log_error';<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u6700\u8fd1\u7684\u9519\u8bef（8.0 \u652f\u6301\u4ece error log \u8bfb）
\nSELECT * FROM performance_schema.error_log
\nWHERE SUPPRESSED = ''
\nORDER by EVENT_TIMESTAMP DESC
\nLIMIT 20;<\/p>\n\n\u5e38\u89c1\u9519\u8bef\u8bf4\u660e\u5904\u7406<\/tr>\n\n\n\n\n\n\n
Can't connect to server<\/td>\n\u8fde\u63a5\u88ab\u62d2<\/td>\n\u68c0\u67e5\u7aef\u53e3\/\u9632\u706b\u5899\/\u8fde\u63a5\u6570<\/td>\n<\/tr>\n
Too many connections<\/td>\n\u8fde\u63a5\u6570\u6253\u6ee1<\/td>\n\u8c03\u5927 max_connections \u6216\u6392\u67e5\u6cc4\u6f0f<\/td>\n<\/tr>\n
Deadlock found<\/td>\n\u6b7b\u9501<\/td>\n\u67e5\u770b\u6b7b\u9501\u65e5\u5fd7，\u4f18\u5316\u4e8b\u52a1\u987a\u5e8f<\/td>\n<\/tr>\n
Table doesn't exist<\/td>\n\u8868\u4e0d\u5b58\u5728<\/td>\n\u68c0\u67e5\u5e93\u540d\/\u8868\u540d\u62fc\u5199<\/td>\n<\/tr>\n
Got error 28 from storage engine<\/td>\n\u78c1\u76d8\u6ee1<\/td>\n\u6e05\u7406\u78c1\u76d8\u7a7a\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

6.2 \u6b7b\u9501\u5206\u6790<\/h4>\n<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u6700\u8fd1\u4e00\u6b21\u6b7b\u9501\u8be6\u60c5
\nSHOW ENGINE INNODB STATUS\\\\G
\n— \u91cd\u70b9\u770b LATEST DETECTED DEADLOCK \u6bb5<\/p>\n

— \u89e3\u91ca：\u5f00\u542f\u6b7b\u9501\u65e5\u5fd7\u8bb0\u5f55\u5230 error log
\nSET GLOBAL innodb_print_all_deadlocks = ON;<\/p>\n

\"\u56fe<\/p>\n

\u56fe 6<\/p>\n<\/p>\n

\n

\u4e03\u3001\u5907\u4efd\u68c0\u67e5（\u65e5\u5e38\u5fc5\u505a）<\/h3>\n<\/p>\n

# \u89e3\u91ca：\u68c0\u67e5\u6628\u65e5\u5907\u4efd\u6587\u4ef6\u662f\u5426\u5b58\u5728\u3001\u5927\u5c0f\u662f\u5426\u6b63\u5e38
\nls -lh \/backup\/mysql\/
\n# \u671f\u671b：\u5907\u4efd\u6587\u4ef6\u5927\u5c0f > 0，\u4e14\u4e0e\u5e93\u5927\u5c0f\u6bd4\u4f8b\u5408\u7406<\/p>\n

# \u89e3\u91ca：\u68c0\u67e5\u5907\u4efd\u65e5\u5fd7\u662f\u5426\u6709\u62a5\u9519
\ntail -50 \/backup\/mysql\/backup.log<\/p>\n

— \u89e3\u91ca：\u68c0\u67e5 binlog \u662f\u5426\u6b63\u5e38\u751f\u6210（\u5907\u4efd\u4f9d\u8d56 binlog \u505a\u589e\u91cf）
\nSHOW BINARY LOGS;<\/p>\n

— \u89e3\u91ca：\u68c0\u67e5\u4e3b\u4ece\u590d\u5236\u72b6\u6001（\u5982\u679c\u6709\u4ece\u5e93）
\nSHOW REPLICA STATUS\\\\G — 8.0 \u7528 REPLICA，5.7 \u7528 SLAVE<\/p>\n\n\u68c0\u67e5\u9879\u6b63\u5e38\u6807\u51c6<\/tr>\n\n\n\n\n\n
\u5907\u4efd\u6587\u4ef6\u5b58\u5728<\/td>\n\u6bcf\u65e5\u5907\u4efd\u6587\u4ef6\u751f\u6210\u4e14\u5927\u5c0f > 0<\/td>\n<\/tr>\n
\u5907\u4efd\u65e5\u5fd7<\/td>\n\u65e0 ERROR\/WARNING<\/td>\n<\/tr>\n
binlog \u8fde\u7eed<\/td>\nSHOW BINARY LOGS \u65e0 gaps<\/td>\n<\/tr>\n
\u4ece\u5e93\u5ef6\u8fdf<\/td>\nSeconds_Behind_Source < 60 \u79d2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u516b\u3001\u78c1\u76d8\u4e0e\u7a7a\u95f4\u5de1\u68c0<\/h3>\n<\/p>\n

# \u89e3\u91ca：\u6570\u636e\u76ee\u5f55\u78c1\u76d8\u4f7f\u7528\u7387
\ndf -h \/data<\/p>\n

# \u89e3\u91ca：binlog \u76ee\u5f55\u5927\u5c0f
\ndu -sh \/data\/mysql\/binlog\/<\/p>\n

# \u89e3\u91ca：error log \/ slow log \u5927\u5c0f
\ndu -sh \/data\/mysql\/error.log \/data\/mysql\/slow.log<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u5404\u5e93\u5927\u5c0f\u6392\u884c
\nSELECT TABLE_SCHEMA,
\n ROUND(SUM(DATA_LENGTH+INDEX_LENGTH)\/1024\/1024\/1024, 2) AS total_gb
\nFROM information_schema.TABLES
\nGROUP BY TABLE_SCHEMA
\nORDER BY total_gb DESC;<\/p>\n

— \u89e3\u91ca：\u67e5\u770b\u6700\u5927\u7684 10 \u5f20\u8868
\nSELECT TABLE_SCHEMA, TABLE_NAME,
\n ROUND((DATA_LENGTH+INDEX_LENGTH)\/1024\/1024\/1024, 2) AS total_gb
\nFROM information_schema.TABLES
\nORDER BY (DATA_LENGTH+INDEX_LENGTH) DESC
\nLIMIT 10;<\/p>\n

\n

\u4e5d\u3001VMware \u865a\u673a\u8fd0\u7ef4\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\u9879\u5efa\u8bae\u539f\u56e0<\/tr>\n\n\n\n\n\n\n
\u5feb\u7167\u7ba1\u7406<\/td>\n\u4e0d\u8981\u5728\u4e1a\u52a1\u8fd0\u884c\u65f6\u9891\u7e41\u5feb\u7167，\u5feb\u7167\u94fe\u4e0d\u5b9c\u8d85\u8fc7 2 \u5c42<\/td>\n\u5feb\u7167\u4f1a\u5bfc\u81f4\u78c1\u76d8 IO \u6027\u80fd\u6025\u5267\u4e0b\u964d<\/td>\n<\/tr>\n
\u65f6\u95f4\u540c\u6b65<\/td>\nVMware Tools \u65f6\u95f4\u540c\u6b65\u4fdd\u6301\u5f00\u542f<\/td>\n\u6162\u67e5\u8be2\u65e5\u5fd7\u65f6\u95f4\u6233\u3001binlog \u4f4d\u70b9\u4f9d\u8d56\u51c6\u786e\u65f6\u95f4<\/td>\n<\/tr>\n
\u78c1\u76d8\u7a7a\u95f4\u76d1\u63a7<\/td>\n\u9884\u7559 20% \u4ee5\u4e0a\u7a7a\u95f2\u7a7a\u95f4<\/td>\n\u5feb\u7167 delta \u4f1a\u6301\u7eed\u589e\u957f，\u78c1\u76d8\u6ee1\u5bfc\u81f4 MySQL crash<\/td>\n<\/tr>\n
\u5185\u5b58\u81a8\u80c0<\/td>\n\u76d1\u63a7 VMware \u5185\u5b58\u81a8\u80c0\u9a71\u52a8（ballooning）<\/td>\n\u5bbf\u4e3b\u673a\u5185\u5b58\u7d27\u5f20\u65f6 ballooning \u4f1a\u997f\u6b7b\u865a\u673a<\/td>\n<\/tr>\n
\u5907\u4efd\u65b9\u5f0f<\/td>\n\u4e0d\u8981\u7528 VMware \u5feb\u7167\u66ff\u4ee3 MySQL \u5907\u4efd<\/td>\n\u5feb\u7167\u4e0d\u662f\u6570\u636e\u5e93\u4e00\u81f4\u6027\u5907\u4efd，\u6062\u590d\u540e\u53ef\u80fd\u9700 crash recovery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u5341\u3001\u8e29\u5751\u8bb0\u5f55（\u5b9e\u6d4b\u6c47\u603b）<\/h3>\n\n#\u5751\u73b0\u8c61\u89e3\u51b3<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\n\u8fde\u63a5\u6570\u6253\u6ee1<\/td>\n\u5e94\u7528\u62a5 Too many connections<\/td>\n\u6392\u67e5\u5e94\u7528\u8fde\u63a5\u6c60\u6cc4\u6f0f，\u8c03\u5927 max_connections<\/td>\n<\/tr>\n
2<\/td>\n\u957f\u4e8b\u52a1\u672a\u63d0\u4ea4<\/td>\nundo \u81a8\u80c0\u3001\u9501\u4e0d\u91ca\u653e<\/td>\n\u67e5 innodb_trx，KILL \u957f\u4e8b\u52a1<\/td>\n<\/tr>\n
3<\/td>\n\u6b7b\u9501\u672a\u76d1\u63a7<\/td>\n\u4e1a\u52a1\u5076\u53d1 ERROR 1213<\/td>\n\u5f00 innodb_print_all_deadlocks，\u5b9a\u671f\u5206\u6790<\/td>\n<\/tr>\n
4<\/td>\n\u6162\u67e5\u8be2\u65e5\u5fd7\u6ca1\u5f00<\/td>\n\u4e0d\u77e5\u9053\u54ea\u6761 SQL \u6162<\/td>\n\u5f00\u542f slow_query_log，\u8bbe long_query_time=1<\/td>\n<\/tr>\n
5<\/td>\nbinlog \u5360\u6ee1\u78c1\u76d8<\/td>\n\u78c1\u76d8\u6ee1 MySQL crash<\/td>\n\u8c03\u5c0f expire_logs_days，\u5b9a\u671f PURGE BINARY LOGS<\/td>\n<\/tr>\n
6<\/td>\nerror log \u8def\u5f84\u4e0d\u5bf9<\/td>\n\u627e\u4e0d\u5230\u9519\u8bef\u4fe1\u606f<\/td>\n\u786e\u8ba4 log_error \u53c2\u6570，\u5b9a\u671f\u8f6e\u8f6c\u65e5\u5fd7<\/td>\n<\/tr>\n
7<\/td>\nKILL \u8fde\u63a5\u4e0d\u751f\u6548<\/td>\nKILL \u540e\u8fde\u63a5\u8fd8\u5728<\/td>\nKILL \u662f\u5f02\u6b65\u7684，\u5927\u4e8b\u52a1\u9700\u8981\u7b49\u9501\u91ca\u653e<\/td>\n<\/tr>\n
8<\/td>\n\u4ece\u5e93\u5ef6\u8fdf\u5927<\/td>\n\u4e3b\u5e93\u66f4\u65b0\u4ece\u5e93\u770b\u4e0d\u5230<\/td>\n\u67e5Seconds_Behind_Source，\u4f18\u5316\u5927\u4e8b\u52a1<\/td>\n<\/tr>\n
9<\/td>\nVMware \u5feb\u7167\u6ca1\u5220<\/td>\n\u78c1\u76d8\u8d8a\u6765\u8d8a\u5927\u3001IO \u53d8\u6162<\/td>\n\u505a\u5b8c\u9a8c\u8bc1\u540e\u7acb\u5373\u5220\u9664\u5feb\u7167<\/td>\n<\/tr>\n
10<\/td>\ntime_zone \u672a\u8bbe\u7f6e<\/td>\n\u65f6\u95f4\u51fd\u6570\u8fd4\u56de UTC<\/td>\nmy.cnf \u8bbe\u7f6e default-time-zone='+8:00'<\/td>\n<\/tr>\n
11<\/td>\nperformance_schema \u6ca1\u5f00<\/td>\n\u9501\/\u4e8b\u52a1\u67e5\u4e0d\u4e86<\/td>\n8.0 \u9ed8\u8ba4\u5f00\u542f，\u786e\u8ba4 performance_schema=ON<\/td>\n<\/tr>\n
12<\/td>\n\u5907\u4efd\u6ca1\u9a8c\u8bc1<\/td>\n\u771f\u6062\u590d\u65f6\u624d\u53d1\u73b0\u5907\u4efd\u635f\u574f<\/td>\n\u5b9a\u671f\u505a\u6062\u590d\u6f14\u7ec3，\u4e0d\u80fd\u53ea\u770b\u5907\u4efd\u6210\u529f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u5341\u4e00\u3001\u8981\u70b9\u901f\u8bb0<\/h3>\n
  • \u65e5\u5e38\u5de1\u68c0\u4e09\u677f\u65a7：processlist \u770b\u8fde\u63a5\u3001innodb_trx \u770b\u4e8b\u52a1\u3001data_locks \u770b\u9501\u3002<\/li>\n
  • \u6162\u67e5\u8be2\u662f\u6027\u80fd\u4f18\u5316\u5165\u53e3：slow.log + pt-query-digest \u662f\u6807\u914d\u3002<\/li>\n
  • \u957f\u4e8b\u52a1\u662f\u4e07\u6076\u4e4b\u6e90：undo \u81a8\u80c0\u3001\u9501\u4e0d\u91ca\u653e\u3001\u4e3b\u4ece\u5ef6\u8fdf\u90fd\u8ddf\u5b83\u6709\u5173\u3002<\/li>\n
  • \u5907\u4efd\u4e0d\u80fd\u53ea\u770b\u6210\u529f：\u5fc5\u987b\u5b9a\u671f\u6062\u590d\u6f14\u7ec3，\u5907\u4efd\u2260\u53ef\u6062\u590d\u3002<\/li>\n
  • VMware \u5feb\u7167 \u2260 \u6570\u636e\u5e93\u5907\u4efd：\u5feb\u7167\u53ea\u662f\u865a\u673a\u5c42\u9762，\u6570\u636e\u5e93\u4e00\u81f4\u6027\u4ecd\u9700 mysqldump\/xtrabackup\u3002<\/li>\n
    \n

    \u5341\u4e8c\u3001\u53c2\u8003\u8d44\u6599（\u5b98\u65b9\u6b63\u5f0f\u6587\u6863）<\/h3>\n\n\u4e3b\u9898\u5b98\u65b9\u94fe\u63a5<\/tr>\n\n\n\n\n\n\n\n\n\n\n
    MySQL 8.0 Reference Manual<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/<\/td>\n<\/tr>\n
    InnoDB Locking（\u9501\u673a\u5236）<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-locking.html<\/td>\n<\/tr>\n
    InnoDB Transaction Model<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-transaction-model.html<\/td>\n<\/tr>\n
    The Slow Query Log<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/slow-query-log.html<\/td>\n<\/tr>\n
    The Error Log<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/error-log.html<\/td>\n<\/tr>\n
    SHOW PROCESSLIST<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/show-processlist.html<\/td>\n<\/tr>\n
    Performance Schema Lock Tables<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/performance-schema-lock-tables.html<\/td>\n<\/tr>\n
    sys Schema（innodb_lock_waits）<\/td>\nhttps:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/sys-schema.html<\/td>\n<\/tr>\n
    Percona Toolkit (pt-query-digest)<\/td>\nhttps:\/\/www.percona.com\/software\/database-tools\/percona-toolkit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n

    \u672c\u6587\u7ae0\u5c5e\u4e8e\u300aMySQL \u6570\u636e\u5e93\u5168\u6808\u8fd0\u7ef4\u5b9e\u6218\u7cfb\u5217\u300b\u65e5\u5e38\u8fd0\u7ef4\u7bc7\u3002\u6b22\u8fce\u6536\u85cf\u3001\u4ea4\u6d41\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    04_MySQL DBA \u65e5\u5e38\u8fd0\u7ef4\u624b\u518c \u2014\u2014 \u4f1a\u8bdd\u7ba1\u7406\u3001\u9501\u4e0e\u963b\u585e\u3001\u4e8b\u52a1\u76d1\u63a7\u3001\u6162\u67e5\u8be2\u4e0e\u65e5\u5fd7\u5de1\u68c0
    \n\u7cfb\u5217\u5b9a\u4f4d：\u300aMySQL \u6570\u636e\u5e93\u5168\u6808\u8fd0\u7ef4\u5b9e\u6218\u7cfb\u5217\u300b\u7b2c 04 \u7bc7，\u4e0e\u300aOracle \u6570\u636e\u5e93\u5168\u6808\u8fd0\u7ef4\u5b9e\u6218\u7cfb\u5217（VMware \u7248）\u300b\u540c\u6784\u5bf9\u6807\u3002\u9002\u7528\u7248\u672c：MySQL 8.0（5.7 \u5dee\u5f02\u968f\u6587\u6807\u6ce8）\u3002\u5b98\u65b9\u6587\u6863：MySQL 8.0 Reference Manual\u3001Server Stat<\/p>\n","protected":false},"author":2,"featured_media":120248,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[114,768,100,188,44],"topic":[],"class_list":["post-120254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-mysql","tag-sql","tag-100","tag-188","tag-44"],"yoast_head":"\n04_MySQL DBA \u65e5\u5e38\u8fd0\u7ef4\u624b\u518c \u2014\u2014 \u4f1a\u8bdd\u7ba1\u7406\u3001\u9501\u4e0e\u963b\u585e\u3001\u4e8b\u52a1\u76d1\u63a7\u3001\u6162\u67e5\u8be2\u4e0e\u65e5\u5fd7\u5de1\u68c0 - 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