如何理解MySQL层事务提交流程

如何理解MySQL层事务提交流程，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

部分栈帧：

prepare栈帧

(gdb) bt#0  binlog_prepare (hton=0x346f260, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:1578#1  0x0000000000f64e80 in ha_prepare_low (thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:2348#2  0x0000000001856176 in MYSQL_BIN_LOG::prepare (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8165#3  0x0000000000f63d1f in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1803#4  0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#5  0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#6  0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#7  0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#8  0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#9  0x00000000016e28f0 in handle_connection (arg=0x384a5d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#10 0x0000000001d7a514 in pfs_spawn_thread (arg=0x3848260) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#11 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#12 0x0000003f740e8bcd in clone () from /lib64/libc.so.6(gdb) b innobase_trx_initBreakpoint 7 at 0x19a5fdb: file /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc, line 2753.(gdb) cContinuing.

trx_prepare_low

Breakpoint 7, innobase_trx_init (thd=0x7fff2c000b70, trx=0x7ffff2f2db00) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:27532753            DBUG_ENTER("innobase_trx_init");(gdb) bt #0  innobase_trx_init (thd=0x7fff2c000b70, trx=0x7ffff2f2db00) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:2753#1  0x00000000019a6291 in check_trx_exists (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:2816#2  0x00000000019c2b90 in innobase_xa_prepare (hton=0x2e9cdd0, thd=0x7fff2c000b70, prepare_trx=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:17458#3  0x0000000000f64e80 in ha_prepare_low (thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:2348#4  0x0000000001856176 in MYSQL_BIN_LOG::prepare (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8165#5  0x0000000000f63d1f in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1803#6  0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#7  0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#8  0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#9  0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#10 0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#11 0x00000000016e28f0 in handle_connection (arg=0x384a5d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#12 0x0000000001d7a514 in pfs_spawn_thread (arg=0x3848260) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#13 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#14 0x0000003f740e8bcd in clone () from /lib64/libc.so.6(gdb)

flush 之前写redo 栈帧
1145 bool write_header = new_data_offset == 0;

(gdb) bt#0  log_group_write_buf (group=0x33ef9f8, buf=0x7fffa5b38000 "\200\020\300\253\002", len=1024, pad_len=0, start_lsn=562123776, new_data_offset=465)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/log/log0log.cc:1145#1  0x0000000001a50dd5 in log_write_up_to (lsn=562124558, flush_to_disk=true) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/log/log0log.cc:1493#2  0x0000000001a50ec7 in log_buffer_flush_to_disk (sync=true) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/log/log0log.cc:1524#3  0x00000000019a9077 in innobase_flush_logs (hton=0x2e9cdd0, binlog_group_flush=true)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4407#4  0x0000000000f65893 in flush_handlerton (thd=0x0, plugin=0x7ffff03588e8, arg=0x7ffff0358944) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:2606#5  0x00000000015d76ee in plugin_foreach_with_mask (thd=0x0, func=0xf65835 , type=1, state_mask=4294967287,     arg=0x7ffff0358944) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_plugin.cc:2318#6  0x0000000000f658ef in ha_flush_logs (db_type=0x0, binlog_group_flush=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:2617#7  0x000000000185725d in MYSQL_BIN_LOG::process_flush_stage_queue (this=0x2dffe80, total_bytes_var=0x7ffff0358a88, rotate_var=0x7ffff0358a87,     out_queue_var=0x7ffff0358a78) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8541#8  0x00000000018588bf in MYSQL_BIN_LOG::ordered_commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false, skip_commit=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:9189#9  0x0000000001856f2c in MYSQL_BIN_LOG::commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8440#10 0x0000000000f63df8 in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1818#11 0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#12 0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#13 0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#14 0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#15 0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#16 0x00000000016e28f0 in handle_connection (arg=0x68e1060) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#17 0x0000000001d7a514 in pfs_spawn_thread (arg=0x3848660) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#18 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#19 0x0000003f740e8bcd in clone () from /lib64/libc.so.6

order commit innodb层commit栈帧

Breakpoint 2, trx_purge_add_update_undo_to_history (trx=0x7ffff2f2e068, undo_ptr=0x7ffff2f2e488, undo_page=0x7fffb0244000 "E\373\332r", update_rseg_history_len=true,     n_added_logs=1, mtr=0x7ffff03582f0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0purge.cc:332332             undo = undo_ptr->update_undo;(gdb) bt#0  trx_purge_add_update_undo_to_history (trx=0x7ffff2f2e068, undo_ptr=0x7ffff2f2e488, undo_page=0x7fffb0244000 "E\373\332r", update_rseg_history_len=true,     n_added_logs=1, mtr=0x7ffff03582f0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0purge.cc:332#1  0x0000000001bef543 in trx_undo_update_cleanup (trx=0x7ffff2f2e068, undo_ptr=0x7ffff2f2e488, undo_page=0x7fffb0244000 "E\373\332r", update_rseg_history_len=true,     n_added_logs=1, mtr=0x7ffff03582f0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0undo.cc:1962#2  0x0000000001bddf57 in trx_write_serialisation_history (trx=0x7ffff2f2e068, mtr=0x7ffff03582f0)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:1698#3  0x0000000001bdf45d in trx_commit_low (trx=0x7ffff2f2e068, mtr=0x7ffff03582f0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2204#4  0x0000000001bdf5d2 in trx_commit (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2274#5  0x0000000001bdff38 in trx_commit_for_mysql (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2550#6  0x00000000019a9101 in innobase_commit_low (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4451#7  0x00000000019a99e7 in innobase_commit (hton=0x2e9cdd0, thd=0x7fff2c000b70, commit_trx=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4740#8  0x0000000000f64104 in ha_commit_low (thd=0x7fff2c000b70, all=false, run_after_commit=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1923#9  0x000000000185764b in MYSQL_BIN_LOG::process_commit_stage_queue (this=0x2dffe80, thd=0x7fff2c000b70, first=0x7fff2c000b70)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8647#10 0x0000000001858e7d in MYSQL_BIN_LOG::ordered_commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false, skip_commit=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:9318#11 0x0000000001856f2c in MYSQL_BIN_LOG::commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8440#12 0x0000000000f63df8 in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1818#13 0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#14 0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#15 0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#16 0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#17 0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#18 0x00000000016e28f0 in handle_connection (arg=0x68e11d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#19 0x0000000001d7a514 in pfs_spawn_thread (arg=0x38484d0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#20 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#21 0x0000003f740e8bcd in clone () from /lib64/libc.so.6(gdb) cContinuing.Breakpoint 8, trx_commit_in_memory (trx=0x7ffff2f2e068, mtr=0x7ffff03582f0, serialised=true)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:19721972            trx->must_flush_log_later = false;(gdb) bt#0  trx_commit_in_memory (trx=0x7ffff2f2e068, mtr=0x7ffff03582f0, serialised=true) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:1972#1  0x0000000001bdf52a in trx_commit_low (trx=0x7ffff2f2e068, mtr=0x7ffff03582f0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2250#2  0x0000000001bdf5d2 in trx_commit (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2274#3  0x0000000001bdff38 in trx_commit_for_mysql (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2550#4  0x00000000019a9101 in innobase_commit_low (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4451#5  0x00000000019a99e7 in innobase_commit (hton=0x2e9cdd0, thd=0x7fff2c000b70, commit_trx=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4740#6  0x0000000000f64104 in ha_commit_low (thd=0x7fff2c000b70, all=false, run_after_commit=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1923#7  0x000000000185764b in MYSQL_BIN_LOG::process_commit_stage_queue (this=0x2dffe80, thd=0x7fff2c000b70, first=0x7fff2c000b70)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8647#8  0x0000000001858e7d in MYSQL_BIN_LOG::ordered_commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false, skip_commit=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:9318#9  0x0000000001856f2c in MYSQL_BIN_LOG::commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8440#10 0x0000000000f63df8 in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1818#11 0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#12 0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#13 0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#14 0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#15 0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#16 0x00000000016e28f0 in handle_connection (arg=0x68e11d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#17 0x0000000001d7a514 in pfs_spawn_thread (arg=0x38484d0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#18 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#19 0x0000003f740e8bcd in clone () from /lib64/libc.so.6(gdb) cContinuing.Breakpoint 3, trx_commit_complete_for_mysql (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:25702570            if (trx->id != 0(gdb) bt#0  trx_commit_complete_for_mysql (trx=0x7ffff2f2e068) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/trx/trx0trx.cc:2570#1  0x00000000019a9aab in innobase_commit (hton=0x2e9cdd0, thd=0x7fff2c000b70, commit_trx=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:4762#2  0x0000000000f64104 in ha_commit_low (thd=0x7fff2c000b70, all=false, run_after_commit=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1923#3  0x000000000185764b in MYSQL_BIN_LOG::process_commit_stage_queue (this=0x2dffe80, thd=0x7fff2c000b70, first=0x7fff2c000b70)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8647#4  0x0000000001858e7d in MYSQL_BIN_LOG::ordered_commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false, skip_commit=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:9318#5  0x0000000001856f2c in MYSQL_BIN_LOG::commit (this=0x2dffe80, thd=0x7fff2c000b70, all=false) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/binlog.cc:8440#6  0x0000000000f63df8 in ha_commit_trans (thd=0x7fff2c000b70, all=false, ignore_global_read_lock=false)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:1818#7  0x00000000016b3d7d in trans_commit_stmt (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/transaction.cc:458#8  0x00000000015ac64f in mysql_execute_command (thd=0x7fff2c000b70, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5239#9  0x00000000015adcae in mysql_parse (thd=0x7fff2c000b70, parser_state=0x7ffff035b600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836#10 0x00000000015a1b6d in dispatch_command (thd=0x7fff2c000b70, com_data=0x7ffff035bd70, command=COM_QUERY)    at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447#11 0x00000000015a099e in do_command (thd=0x7fff2c000b70) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010#12 0x00000000016e28f0 in handle_connection (arg=0x68e11d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312#13 0x0000000001d7a514 in pfs_spawn_thread (arg=0x38484d0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188#14 0x0000003f74807aa1 in start_thread () from /lib64/libpthread.so.0#15 0x0000003f740e8bcd in clone () from /lib64/libc.so.6

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