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MDEV-7102: Incorrect PSI_stage_info message in SHOW PROCESSLIST during parallel replication

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In parallel replication, threads can do two different waits for a prior
transaction. One is for the prior transaction to start commit, the other is
for it to complete commit.

It turns out that the same PSI_stage_info message was errorneously used in
both cases (probably a merge error), causing SHOW PROCESSLIST to be
misleading.

Fix by using correct, distinct message in each case.
This commit is contained in:
Kristian Nielsen
2014-11-13 09:56:28 +01:00
parent ecc33da2ca
commit a98a034c5e
3 changed files with 5 additions and 2 deletions
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4
sql/mysqld.cc
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@@ -9484,7 +9484,8 @@ PSI_stage_info stage_binlog_waiting_background_tasks= { 0, "Waiting for backgrou
PSI_stage_info stage_binlog_processing_checkpoint_notify= { 0, "Processing binlog checkpoint notification", 0};
PSI_stage_info stage_binlog_stopping_background_thread= { 0, "Stopping binlog background thread", 0};
PSI_stage_info stage_waiting_for_work_from_sql_thread= { 0, "Waiting for work from SQL thread", 0};
PSI_stage_info stage_waiting_for_prior_transaction_to_commit= { 0, "Waiting for prior transaction to start commit before starting next transaction", 0};
PSI_stage_info stage_waiting_for_prior_transaction_to_commit= { 0, "Waiting for prior transaction to commit", 0};
PSI_stage_info stage_waiting_for_prior_transaction_to_start_commit= { 0, "Waiting for prior transaction to start commit before starting next transaction", 0};
PSI_stage_info stage_waiting_for_room_in_worker_thread= { 0, "Waiting for room in worker thread event queue", 0};
PSI_stage_info stage_master_gtid_wait_primary= { 0, "Waiting in MASTER_GTID_WAIT() (primary waiter)", 0};
PSI_stage_info stage_master_gtid_wait= { 0, "Waiting in MASTER_GTID_WAIT()", 0};
@@ -9599,6 +9600,7 @@ PSI_stage_info *all_server_stages[]=
& stage_waiting_for_master_to_send_event,
& stage_waiting_for_master_update,
& stage_waiting_for_prior_transaction_to_commit,
& stage_waiting_for_prior_transaction_to_start_commit,
& stage_waiting_for_query_cache_lock,
& stage_waiting_for_relay_log_space,
& stage_waiting_for_room_in_worker_thread,