时间A：
mysql> select trx_id,trx_state,trx_query,trx_operation_state,trx_concurrency_tickets from information_schema.innodb_trx \G
*************************** 1. row ***************************
trx_id: 162612
trx_state: RUNNING
trx_query: insert into testti3 select * from testti3
trx_operation_state: sleeping before entering InnoDB
trx_concurrency_tickets: 0
*************************** 2. row ***************************
trx_id: 422212176322720
trx_state: RUNNING
trx_query: insert into testui select * from testui
trx_operation_state: fetching rows
trx_concurrency_tickets: 2
2 rows in set (0.01 sec)
时间B：
mysql> select trx_id,trx_state,trx_query,trx_operation_state,trx_concurrency_tickets from information_schema.innodb_trx \G
*************************** 1. row ***************************
trx_id: 162612
trx_state: RUNNING
trx_query: insert into testti3 select * from testti3
trx_operation_state: NULL
trx_concurrency_tickets: 10
*************************** 2. row ***************************
trx_id: 422212176322720
trx_state: RUNNING
trx_query: insert into testui select * from testui
trx_operation_state: sleeping before entering InnoDB
trx_concurrency_tickets: 0
2 rows in set (0.32 sec)
从trx_operation_state中可以看到他们不断的在进行轮换的进入的innodb层次，同时我们还能看到活跃事物trx_concurrency_tickets这个tickets不断的减少，而处于sleeping before entering InnoDB的事物其trx_concurrency_tickets为0。
四、事物等待进入innodb层堆栈
虽然没有研究源码但是还是将堆栈打出来，方便以后研究
#0 0x0000003ca620ef3d in nanosleep () from /lib64/libpthread.so.0
#1 0x0000000001a80c73 in os_thread_sleep (tm=1026) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/os/os0thread.cc:278
#2 0x0000000001b74e81 in srv_conc_enter_innodb_with_atomics (trx=0x7fffeeca15d0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/srv/srv0conc.cc:214
#3 0x0000000001b74fcb in srv_conc_enter_innodb (prebuilt=0x7fffb41b7110) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/srv/srv0conc.cc:259
#4 0x000000000199c8c8 in innobase_srv_conc_enter_innodb (prebuilt=0x7fffb41b7110)
at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:1671
#5 0x00000000019a856d in ha_innobase::write_row (this=0x7fffb41b6b60, record=0x7fffb41af0d0 "\375\001")
at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/handler/ha_innodb.cc:7920
#6 0x0000000000f72e73 in handler::ha_write_row (this=0x7fffb41b6b60, buf=0x7fffb41af0d0 "\375\001") at /root/mysql5.7.14/percona-server-5.7.14-7/sql/handler.cc:8228
#7 0x00000000017d0c10 in write_record (thd=0x7fffb402eb20, table=0x7fffb41b61b0, info=0x7fffb40283f0, update=0x7fffb4028468)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_insert.cc:1864
#8 0x00000000017d2117 in Query_result_insert::send_data (this=0x7fffb40283a8, values=...) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_insert.cc:2262
#9 0x000000000155f954 in end_send (join=0x7fffb40286d0, qep_tab=0x7fffb41e4948, end_of_records=false)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:2919
#10 0x000000000155c515 in evaluate_join_record (join=0x7fffb40286d0, qep_tab=0x7fffb41e47d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:1639
#11 0x00000000015646b7 in QEP_tmp_table::end_send (this=0x7fffb4028ad0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:4710
#12 0x000000000155b508 in sub_select_op (join=0x7fffb40286d0, qep_tab=0x7fffb41e47d0, end_of_records=true)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:1063
#13 0x000000000155b640 in sub_select (join=0x7fffb40286d0, qep_tab=0x7fffb41e4658, end_of_records=true)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:1220
#14 0x000000000155b1ba in do_select (join=0x7fffb40286d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:946
#15 0x0000000001559060 in JOIN::exec (this=0x7fffb40286d0) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_executor.cc:199
#16 0x00000000015f932a in handle_query (thd=0x7fffb402eb20, lex=0x7fffb4031100, result=0x7fffb40283a8, added_options=1342177280, removed_options=0)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_select.cc:184
#17 0x00000000017d4d5f in Sql_cmd_insert_select::execute (this=0x7fffb4028330, thd=0x7fffb402eb20) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_insert.cc:3199
#18 0x00000000015a6bea in mysql_execute_command (thd=0x7fffb402eb20, first_level=true) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:3719
#19 0x00000000015ad15a in mysql_parse (thd=0x7fffb402eb20, parser_state=0x7fffec12c600) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:5836
#20 0x00000000015a1019 in dispatch_command (thd=0x7fffb402eb20, com_data=0x7fffec12cd70, command=COM_QUERY)
at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1447
#21 0x000000000159fe4a in do_command (thd=0x7fffb402eb20) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/sql_parse.cc:1010
#22 0x00000000016e1d9c in handle_connection (arg=0x3a06b60) at /root/mysql5.7.14/percona-server-5.7.14-7/sql/conn_handler/connection_handler_per_thread.cc:312
#23 0x0000000001d72180 in pfs_spawn_thread (arg=0x413d3d0) at /root/mysql5.7.14/percona-server-5.7.14-7/storage/perfschema/pfs.cc:2188
#24 0x0000003ca62079d1 in start_thread () from /lib64/libpthread.so.0
#25 0x0000003ca5ee8b6d in clone () from /lib64/libc.so.6