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MDEV-20220: Merge 5.7 P_S replication table 'replication_applier_status_by_worker

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Step1:
=====
Backport 'replication_applier_status_by_worker' from upstream.

Iterate through rpl_parallel_thread_pool and display slave worker thread
specific information as part of 'replication_applier_status_by_worker'
table.

---------------------------------------------------------------------------
|Column Name:           |        Description:                             |
|-------------------------------------------------------------------------|
|                       |                                                 |
|CHANNEL_NAME           | Name of replication channel through which the   |
|                       | transaction is received.                        |
|                       |                                                 |
|THREAD_ID              | Thread_Id as displayed in 'performance_schema.  |
|                       | threads' table for thread with name             |
|                       | 'thread/sql/rpl_parallel_thread'                |
|                       |                                                 |
|                       | THREAD_ID will be NULL when worker threads are  |
|                       | stopped due to an error/force stop              |
|                       |                                                 |
|SERVICE_STATE          | Thread is running or not                        |
|                       |                                                 |
|LAST_SEEN_TRANSACTION  | Last GTID executed by worker                    |
|                       |                                                 |
|LAST_ERROR_NUMBER      | Last Error that occured on a particular worker  |
|                       |                                                 |
|LAST_ERROR_MESSAGE     | Last error specific message                     |
|                       |                                                 |
|LAST_ERROR_TIMESTAMP   | Time stamp of last error                        |
|                       |                                                 |
---------------------------------------------------------------------------

CHANNEL_NAME will be empty when the worker has not processed any
transaction. Channel_name points to valid source channel_name when it is
processing a transaction/event group.
This commit is contained in:
Sujatha
2021-04-08 15:49:32 +05:30
parent 7c524d4414
commit 94f1d0f84d
18 changed files with 565 additions and 289 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
sql/rpl_parallel.cc
View File

@ -1099,6 +1099,11 @@ handle_rpl_parallel_thread(void *arg)
mysql_mutex_lock(&rpt->LOCK_rpl_thread);
rpt->thd= thd;
PSI_thread *psi= PSI_CALL_get_thread();
PSI_CALL_set_thread_os_id(psi);
PSI_CALL_set_thread_THD(psi, thd);
PSI_CALL_set_thread_id(psi, thd->thread_id);
rpt->thd->set_psi(psi);
while (rpt->delay_start)
mysql_cond_wait(&rpt->COND_rpl_thread, &rpt->LOCK_rpl_thread);
@ -1188,6 +1193,12 @@ handle_rpl_parallel_thread(void *arg)
/* Handle a new event group, which will be initiated by a GTID event. */
if ((event_type= qev->ev->get_type_code()) == GTID_EVENT)
{
rpt->last_seen_gtid= rgi->current_gtid;
rpt->channel_name_length= (uint)rgi->rli->mi->connection_name.length;
if (rpt->channel_name_length)
memcpy(rpt->channel_name, rgi->rli->mi->connection_name.str,
rgi->rli->mi->connection_name.length);
bool did_enter_cond= false;
PSI_stage_info old_stage;
@ -2003,6 +2014,12 @@ rpl_parallel_thread::loc_free_gco(group_commit_orderer *gco)
}
rpl_parallel_thread::rpl_parallel_thread()
: channel_name_length(0), last_error_number(0), last_error_timestamp(0)
{
}
rpl_parallel_thread_pool::rpl_parallel_thread_pool()
: threads(0), free_list(0), count(0), inited(false), busy(false)
{