mirror of
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c2118a08b1
LOCK_thd_data was used to protect both THD data and ensure that the THD is not deleted while it was in use This patch moves the THD delete protection to LOCK_thd_kill, which already protects the THD for kill. The benefits are: - More well defined what LOCK_thd_data protects - LOCK_thd_data usage is now much simpler and easier to verify - Less chance of deadlocks in SHOW PROCESS LIST as there is less chance of interactions between mutexes - Remove not needed LOCK_thread_count from thd_get_error_context_description() - Fewer mutex taken for thd->awake() Other things: - Don't take mysys->var mutex in show processlist to check if thread is kill marked - thd->awake() now automatically takes the LOCK_thd_kill mutex (Simplifies code) - Apc uses LOCK_thd_kill instead of LOCK_thd_data
259 lines
12 KiB
Plaintext
259 lines
12 KiB
Plaintext
connect con1, localhost, user1, , ;
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select "MARKER_BEGIN" as marker;
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marker
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MARKER_BEGIN
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select "This is simple statement one" as payload;
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payload
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This is simple statement one
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select "This is simple statement two" as payload;
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payload
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This is simple statement two
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select "This is the first part of a multi query" as payload;
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select "And this is the second part of a multi query" as payload;
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select "With a third part to make things complete" as payload;
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$$
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payload
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This is the first part of a multi query
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payload
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And this is the second part of a multi query
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payload
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With a third part to make things complete
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select "MARKER_END" as marker;
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marker
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MARKER_END
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select "Con1 is done with payload" as status;
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status
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Con1 is done with payload
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connection default;
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set @con1_tid = (select thread_id from performance_schema.threads
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where processlist_user = 'user1');
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select (@con1_tid is not null) as expected;
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expected
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1
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set @marker_begin = (select event_id from performance_schema.events_statements_history_long
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where sql_text like "%MARKER_BEGIN%" and thread_id = @con1_tid);
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select (@marker_begin is not null) as expected;
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expected
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1
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set @marker_end = (select end_event_id from performance_schema.events_statements_history_long
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where sql_text like "%MARKER_END%" and thread_id = @con1_tid);
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select (@marker_end is not null) as expected;
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expected
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1
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show status like "performance_schema%";
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Variable_name Value
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Performance_schema_accounts_lost 0
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Performance_schema_cond_classes_lost 0
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Performance_schema_cond_instances_lost 0
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Performance_schema_digest_lost 0
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Performance_schema_file_classes_lost 0
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Performance_schema_file_handles_lost 0
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Performance_schema_file_instances_lost 0
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Performance_schema_hosts_lost 0
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Performance_schema_locker_lost 0
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Performance_schema_mutex_classes_lost 0
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Performance_schema_mutex_instances_lost 0
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Performance_schema_rwlock_classes_lost 0
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Performance_schema_rwlock_instances_lost 0
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Performance_schema_session_connect_attrs_lost 0
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Performance_schema_socket_classes_lost 0
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Performance_schema_socket_instances_lost 0
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Performance_schema_stage_classes_lost 0
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Performance_schema_statement_classes_lost 0
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Performance_schema_table_handles_lost 0
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Performance_schema_table_instances_lost 0
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Performance_schema_thread_classes_lost 0
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Performance_schema_thread_instances_lost 0
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Performance_schema_users_lost 0
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select * from (
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(
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select (event_id - @marker_begin) as relative_event_id,
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(end_event_id - @marker_begin) as relative_end_event_id,
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event_name,
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sql_text as comment,
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nesting_event_type,
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(nesting_event_id - @marker_begin) as relative_nesting_event_id
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from performance_schema.events_statements_history_long
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where (thread_id = @con1_tid)
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and (@marker_begin <= event_id)
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and (end_event_id <= @marker_end)
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)
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union
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(
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select (event_id - @marker_begin) as relative_event_id,
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(end_event_id - @marker_begin) as relative_end_event_id,
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event_name,
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"(stage)" as comment,
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nesting_event_type,
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(nesting_event_id - @marker_begin) as relative_nesting_event_id
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from performance_schema.events_stages_history_long
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where (thread_id = @con1_tid)
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and (@marker_begin <= event_id)
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and (end_event_id <= @marker_end)
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)
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union
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(
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select (event_id - @marker_begin) as relative_event_id,
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(end_event_id - @marker_begin) as relative_end_event_id,
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event_name,
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operation as comment,
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nesting_event_type,
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(nesting_event_id - @marker_begin) as relative_nesting_event_id
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from performance_schema.events_waits_history_long
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where (thread_id = @con1_tid)
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and (@marker_begin <= event_id)
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and (end_event_id <= @marker_end)
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)
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) all_events
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order by relative_event_id asc;
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relative_event_id relative_end_event_id event_name comment nesting_event_type relative_nesting_event_id
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0 20 statement/sql/select select "MARKER_BEGIN" as marker NULL NULL
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1 4 stage/sql/Init (stage) STATEMENT 0
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2 2 wait/io/socket/sql/client_connection recv STAGE 1
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3 3 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 1
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4 4 wait/io/file/sql/query_log write STAGE 1
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5 5 stage/sql/Checking permissions (stage) STATEMENT 0
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6 6 stage/sql/Opening tables (stage) STATEMENT 0
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7 7 stage/sql/After opening tables (stage) STATEMENT 0
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8 8 stage/sql/Init (stage) STATEMENT 0
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9 9 stage/sql/Optimizing (stage) STATEMENT 0
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10 10 stage/sql/Executing (stage) STATEMENT 0
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11 11 stage/sql/End of update loop (stage) STATEMENT 0
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12 12 stage/sql/Query end (stage) STATEMENT 0
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13 13 stage/sql/Commit (stage) STATEMENT 0
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14 14 stage/sql/Closing tables (stage) STATEMENT 0
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15 15 stage/sql/Starting cleanup (stage) STATEMENT 0
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16 16 stage/sql/Freeing items (stage) STATEMENT 0
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17 17 wait/io/socket/sql/client_connection send STATEMENT 0
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18 18 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STATEMENT 0
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19 20 stage/sql/Reset for next command (stage) STATEMENT 0
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20 20 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 19
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21 21 idle idle NULL NULL
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22 42 statement/sql/select select "This is simple statement one" as payload NULL NULL
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23 26 stage/sql/Init (stage) STATEMENT 22
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24 24 wait/io/socket/sql/client_connection recv STAGE 23
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25 25 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 23
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26 26 wait/io/file/sql/query_log write STAGE 23
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27 27 stage/sql/Checking permissions (stage) STATEMENT 22
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28 28 stage/sql/Opening tables (stage) STATEMENT 22
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29 29 stage/sql/After opening tables (stage) STATEMENT 22
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30 30 stage/sql/Init (stage) STATEMENT 22
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31 31 stage/sql/Optimizing (stage) STATEMENT 22
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32 32 stage/sql/Executing (stage) STATEMENT 22
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33 33 stage/sql/End of update loop (stage) STATEMENT 22
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34 34 stage/sql/Query end (stage) STATEMENT 22
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35 35 stage/sql/Commit (stage) STATEMENT 22
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36 36 stage/sql/Closing tables (stage) STATEMENT 22
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37 37 stage/sql/Starting cleanup (stage) STATEMENT 22
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38 38 stage/sql/Freeing items (stage) STATEMENT 22
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39 39 wait/io/socket/sql/client_connection send STATEMENT 22
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40 40 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STATEMENT 22
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41 42 stage/sql/Reset for next command (stage) STATEMENT 22
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42 42 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 41
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43 43 idle idle NULL NULL
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44 64 statement/sql/select select "This is simple statement two" as payload NULL NULL
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45 48 stage/sql/Init (stage) STATEMENT 44
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46 46 wait/io/socket/sql/client_connection recv STAGE 45
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47 47 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 45
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48 48 wait/io/file/sql/query_log write STAGE 45
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49 49 stage/sql/Checking permissions (stage) STATEMENT 44
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50 50 stage/sql/Opening tables (stage) STATEMENT 44
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51 51 stage/sql/After opening tables (stage) STATEMENT 44
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52 52 stage/sql/Init (stage) STATEMENT 44
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53 53 stage/sql/Optimizing (stage) STATEMENT 44
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54 54 stage/sql/Executing (stage) STATEMENT 44
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55 55 stage/sql/End of update loop (stage) STATEMENT 44
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56 56 stage/sql/Query end (stage) STATEMENT 44
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57 57 stage/sql/Commit (stage) STATEMENT 44
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58 58 stage/sql/Closing tables (stage) STATEMENT 44
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59 59 stage/sql/Starting cleanup (stage) STATEMENT 44
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60 60 stage/sql/Freeing items (stage) STATEMENT 44
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61 61 wait/io/socket/sql/client_connection send STATEMENT 44
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62 62 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STATEMENT 44
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63 64 stage/sql/Reset for next command (stage) STATEMENT 44
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64 64 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 63
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65 65 idle idle NULL NULL
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66 85 statement/sql/select select "This is the first part of a multi query" as payload;
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select "And this is the second part of a multi query" as payload;
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select "With a third part to make things complete" as payload NULL NULL
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67 71 stage/sql/Init (stage) STATEMENT 66
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68 68 wait/io/socket/sql/client_connection recv STAGE 67
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69 69 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 67
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70 70 wait/io/file/sql/query_log write STAGE 67
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71 71 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 67
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72 72 stage/sql/Checking permissions (stage) STATEMENT 66
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73 73 stage/sql/Opening tables (stage) STATEMENT 66
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74 74 stage/sql/After opening tables (stage) STATEMENT 66
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75 75 stage/sql/Init (stage) STATEMENT 66
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76 76 stage/sql/Optimizing (stage) STATEMENT 66
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77 77 stage/sql/Executing (stage) STATEMENT 66
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78 78 stage/sql/End of update loop (stage) STATEMENT 66
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79 79 stage/sql/Query end (stage) STATEMENT 66
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80 80 stage/sql/Commit (stage) STATEMENT 66
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81 81 stage/sql/Closing tables (stage) STATEMENT 66
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82 82 stage/sql/Starting cleanup (stage) STATEMENT 66
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83 85 stage/sql/Freeing items (stage) STATEMENT 66
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84 84 wait/io/socket/sql/client_connection send STAGE 83
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85 85 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STAGE 83
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86 103 statement/sql/select select "And this is the second part of a multi query" as payload;
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select "With a third part to make things complete" as payload NULL NULL
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87 89 stage/sql/Init (stage) STATEMENT 86
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88 88 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 87
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89 89 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 87
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90 90 stage/sql/Checking permissions (stage) STATEMENT 86
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91 91 stage/sql/Opening tables (stage) STATEMENT 86
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92 92 stage/sql/After opening tables (stage) STATEMENT 86
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93 93 stage/sql/Init (stage) STATEMENT 86
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94 94 stage/sql/Optimizing (stage) STATEMENT 86
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95 95 stage/sql/Executing (stage) STATEMENT 86
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96 96 stage/sql/End of update loop (stage) STATEMENT 86
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97 97 stage/sql/Query end (stage) STATEMENT 86
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98 98 stage/sql/Commit (stage) STATEMENT 86
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99 99 stage/sql/Closing tables (stage) STATEMENT 86
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100 100 stage/sql/Starting cleanup (stage) STATEMENT 86
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101 103 stage/sql/Freeing items (stage) STATEMENT 86
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102 102 wait/io/socket/sql/client_connection send STAGE 101
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103 103 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STAGE 101
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104 122 statement/sql/select select "With a third part to make things complete" as payload NULL NULL
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105 106 stage/sql/Init (stage) STATEMENT 104
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106 106 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 105
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107 107 stage/sql/Checking permissions (stage) STATEMENT 104
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108 108 stage/sql/Opening tables (stage) STATEMENT 104
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109 109 stage/sql/After opening tables (stage) STATEMENT 104
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110 110 stage/sql/Init (stage) STATEMENT 104
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111 111 stage/sql/Optimizing (stage) STATEMENT 104
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112 112 stage/sql/Executing (stage) STATEMENT 104
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113 113 stage/sql/End of update loop (stage) STATEMENT 104
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114 114 stage/sql/Query end (stage) STATEMENT 104
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115 115 stage/sql/Commit (stage) STATEMENT 104
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116 116 stage/sql/Closing tables (stage) STATEMENT 104
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117 117 stage/sql/Starting cleanup (stage) STATEMENT 104
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118 118 stage/sql/Freeing items (stage) STATEMENT 104
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119 119 wait/io/socket/sql/client_connection send STATEMENT 104
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120 120 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STATEMENT 104
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121 122 stage/sql/Reset for next command (stage) STATEMENT 104
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122 122 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 121
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123 123 idle idle NULL NULL
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124 144 statement/sql/select select "MARKER_END" as marker NULL NULL
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125 128 stage/sql/Init (stage) STATEMENT 124
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126 126 wait/io/socket/sql/client_connection recv STAGE 125
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127 127 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 125
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128 128 wait/io/file/sql/query_log write STAGE 125
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129 129 stage/sql/Checking permissions (stage) STATEMENT 124
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130 130 stage/sql/Opening tables (stage) STATEMENT 124
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131 131 stage/sql/After opening tables (stage) STATEMENT 124
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132 132 stage/sql/Init (stage) STATEMENT 124
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133 133 stage/sql/Optimizing (stage) STATEMENT 124
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134 134 stage/sql/Executing (stage) STATEMENT 124
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135 135 stage/sql/End of update loop (stage) STATEMENT 124
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136 136 stage/sql/Query end (stage) STATEMENT 124
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137 137 stage/sql/Commit (stage) STATEMENT 124
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138 138 stage/sql/Closing tables (stage) STATEMENT 124
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139 139 stage/sql/Starting cleanup (stage) STATEMENT 124
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140 140 stage/sql/Freeing items (stage) STATEMENT 124
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141 141 wait/io/socket/sql/client_connection send STATEMENT 124
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142 142 wait/synch/mutex/sql/THD::LOCK_thd_kill lock STATEMENT 124
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143 144 stage/sql/Reset for next command (stage) STATEMENT 124
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144 144 wait/synch/mutex/sql/THD::LOCK_thd_data lock STAGE 143
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disconnect con1;
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