mysql 设置 character_set_server_MySQL:简单记录character_set_server影响参数
Waiting for global read lock：由于flush table with read lock調用函數lock_global_read_lock導致DML操作堵塞。
Waiting for commit lock ：由于flush table with read lock 調用函數make_global_read_lock_block_commit導致事務不能提交
現象
堵塞COMMIT和DML
mysql>?show?processlist;
+----+-----------------+-----------+---------+---------+------+------------------------------+----------------------------+-----------+---------------+|?Id?|?User????????????|?Host??????|?db??????|?Command?|?Time?|?State????????????????????????|?Info???????????????????????|?Rows_sent?|?Rows_examined?|
+----+-----------------+-----------+---------+---------+------+------------------------------+----------------------------+-----------+---------------+
|??1?|?event_scheduler?|?localhost?|?NULL????|?Daemon??|??268?|?Waiting?on?empty?queue???????|?NULL???????????????????????|?????????0?|?????????????0?||??5?|?root????????????|?localhost?|?NULL????|?Query???|????0?|?starting?????????????????????|?show?processlist???????????|?????????0?|?????????????0?|
|??6?|?root????????????|?localhost?|?testmts?|?Query???|???61?|?Waiting?for?commit?lock??????|?commit?????????????????????|?????????0?|?????????????0?||??7?|?root????????????|?localhost?|?testmts?|?Query???|????6?|?Waiting?for?global?read?lock?|?delete?from?testcp?limit?1?|?????????0?|?????????????0?|
+----+-----------------+-----------+---------+---------+------+------------------------------+----------------------------+-----------+---------------+
相關棧幀
Waiting for commit lock
#0??0x00007ffff7bd3a5e?in?pthread_cond_timedwait@@GLIBC_2.3.2?()?from?/lib64/libpthread.so.0#1??0x000000000192027b?in?native_cond_timedwait?(cond=0x7ffee0000d08,?mutex=0x7ffee0000cc0,?abstime=0x7fffec5ec950)
at?/mysqldata/percona-server-locks-detail-5.7.22/include/thr_cond.h:129#2??0x00000000019205ea?in?safe_cond_timedwait?(cond=0x7ffee0000d08,?mp=0x7ffee0000c98,?abstime=0x7fffec5ec950,
file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?line=1899)?at?/mysqldata/percona-server-locks-detail-5.7.22/mysys/thr_cond.c:88#3??0x00000000014b9f21?in?my_cond_timedwait?(cond=0x7ffee0000d08,?mp=0x7ffee0000c98,?abstime=0x7fffec5ec950,
file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?line=1899)?at?/mysqldata/percona-server-locks-detail-5.7.22/include/thr_cond.h:180#4??0x00000000014ba484?in?inline_mysql_cond_timedwait?(that=0x7ffee0000d08,?mutex=0x7ffee0000c98,?abstime=0x7fffec5ec950,
src_file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?src_line=1899)
at?/mysqldata/percona-server-locks-detail-5.7.22/include/mysql/psi/mysql_thread.h:1229#5??0x00000000014bb702?in?MDL_wait::timed_wait?(this=0x7ffee0000c98,?owner=0x7ffee0000c00,?abs_timeout=0x7fffec5ec950,?set_status_on_timeout=true,
wait_state_name=0x2d93240)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc:1899#6??0x00000000014bd7ac?in?MDL_context::acquire_lock?(this=0x7ffee0000c98,?mdl_request=0x7fffec5ec9c0,?lock_wait_timeout=31536000)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc:3746#7??0x0000000000f7ffe4?in?ha_commit_trans?(thd=0x7ffee0000c00,?all=true,?ignore_global_read_lock=false)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/handler.cc:1795#8??0x00000000016dcd2f?in?trans_commit?(thd=0x7ffee0000c00)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/transaction.cc:239#9??0x00000000015cf466?in?mysql_execute_command?(thd=0x7ffee0000c00,?first_level=true)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:4526#10?0x00000000015d2fde?in?mysql_parse?(thd=0x7ffee0000c00,?parser_state=0x7fffec5ee600)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:5901#11?0x00000000015c6b72?in?dispatch_command?(thd=0x7ffee0000c00,?com_data=0x7fffec5eed70,?command=COM_QUERY)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:1490#12?0x00000000015c58ff?in?do_command?(thd=0x7ffee0000c00)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:1021#13?0x000000000170e578?in?handle_connection?(arg=0x67bf490)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/conn_handler/connection_handler_per_thread.cc:312#14?0x0000000001945538?in?pfs_spawn_thread?(arg=0x66ff4f0)?at?/mysqldata/percona-server-locks-detail-5.7.22/storage/perfschema/pfs.cc:2190#15?0x00007ffff7bcfaa1?in?start_thread?()?from?/lib64/libpthread.so.0#16?0x00007ffff6b37c4d?in?clone?()?from?/lib64/libc.so.6
Waiting for global read lock
#0??0x00007ffff7bd3a5e?in?pthread_cond_timedwait@@GLIBC_2.3.2?()?from?/lib64/libpthread.so.0#1??0x000000000192027b?in?native_cond_timedwait?(cond=0x7ffee4000c98,?mutex=0x7ffee4000c50,?abstime=0x7fffec58a0e0)
at?/mysqldata/percona-server-locks-detail-5.7.22/include/thr_cond.h:129#2??0x00000000019205ea?in?safe_cond_timedwait?(cond=0x7ffee4000c98,?mp=0x7ffee4000c28,?abstime=0x7fffec58a0e0,
file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?line=1899)?at?/mysqldata/percona-server-locks-detail-5.7.22/mysys/thr_cond.c:88#3??0x00000000014b9f21?in?my_cond_timedwait?(cond=0x7ffee4000c98,?mp=0x7ffee4000c28,?abstime=0x7fffec58a0e0,
file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?line=1899)?at?/mysqldata/percona-server-locks-detail-5.7.22/include/thr_cond.h:180#4??0x00000000014ba484?in?inline_mysql_cond_timedwait?(that=0x7ffee4000c98,?mutex=0x7ffee4000c28,?abstime=0x7fffec58a0e0,
src_file=0x204cdd0?"/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc",?src_line=1899)
at?/mysqldata/percona-server-locks-detail-5.7.22/include/mysql/psi/mysql_thread.h:1229#5??0x00000000014bb702?in?MDL_wait::timed_wait?(this=0x7ffee4000c28,?owner=0x7ffee4000b90,?abs_timeout=0x7fffec58a0e0,?set_status_on_timeout=true,
wait_state_name=0x2d93180)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc:1899#6??0x00000000014bd7ac?in?MDL_context::acquire_lock?(this=0x7ffee4000c28,?mdl_request=0x7fffec58a160,?lock_wait_timeout=31536000)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/mdl.cc:3746#7??0x000000000153bed8?in?open_table?(thd=0x7ffee4000b90,?table_list=0x7ffee40066e0,?ot_ctx=0x7fffec58a5a0)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_base.cc:3233#8??0x000000000153f904?in?open_and_process_table?(thd=0x7ffee4000b90,?lex=0x7ffee40031c0,?tables=0x7ffee40066e0,?counter=0x7ffee4003280,?flags=0,
prelocking_strategy=0x7fffec58a6d0,?has_prelocking_list=false,?ot_ctx=0x7fffec58a5a0)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_base.cc:5213#9??0x0000000001540a58?in?open_tables?(thd=0x7ffee4000b90,?start=0x7fffec58a690,?counter=0x7ffee4003280,?flags=0,?prelocking_strategy=0x7fffec58a6d0)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_base.cc:5831#10?0x0000000001541e93?in?open_tables_for_query?(thd=0x7ffee4000b90,?tables=0x7ffee40066e0,?flags=0)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_base.cc:6606#11?0x00000000017f2b53?in?Sql_cmd_delete::mysql_delete?(this=0x7ffee4006c80,?thd=0x7ffee4000b90,?limit=1)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_delete.cc:76#12?0x00000000017f7098?in?Sql_cmd_delete::execute?(this=0x7ffee4006c80,?thd=0x7ffee4000b90)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_delete.cc:1386#13?0x00000000015cc801?in?mysql_execute_command?(thd=0x7ffee4000b90,?first_level=true)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:3756#14?0x00000000015d2fde?in?mysql_parse?(thd=0x7ffee4000b90,?parser_state=0x7fffec58c600)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:5901#15?0x00000000015c6b72?in?dispatch_command?(thd=0x7ffee4000b90,?com_data=0x7fffec58cd70,?command=COM_QUERY)
at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:1490#16?0x00000000015c58ff?in?do_command?(thd=0x7ffee4000b90)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/sql_parse.cc:1021#17?0x000000000170e578?in?handle_connection?(arg=0x67182c0)?at?/mysqldata/percona-server-locks-detail-5.7.22/sql/conn_handler/connection_handler_per_thread.cc:312#18?0x0000000001945538?in?pfs_spawn_thread?(arg=0x671aca0)?at?/mysqldata/percona-server-locks-detail-5.7.22/storage/perfschema/pfs.cc:2190#19?0x00007ffff7bcfaa1?in?start_thread?()?from?/lib64/libpthread.so.0#20?0x00007ffff6b37c4d?in?clone?()?from?/lib64/libc.so.6
總結
以上是生活随笔為你收集整理的mysql 设置 character_set_server_MySQL:简单记录character_set_server影响参数的全部內容，希望文章能夠幫你解決所遇到的問題。
- 上一篇： scrapy爬取天气存MySQL_Scr
- 下一篇： python widnows mysql