Mdev-10664 Add statuses about optimistic parallel replication stalls

In this commit we are adding three more status variable to SHOW SLAVE
STATUS.  Slave_DDL_Events and Slave_Non_Transactional_Events.

Slave_DDL_Groups:- This status variable counts the occurrence of DDL
statements

Slave_Non_Transactional_Groups:- This variable count the occurrence
of non-transnational event group.

Slave_Transactional_Groups:- This variable count the occurrence
of transnational event group.

Patch Credit:- Kristian Nielsen

1 files changed, 10 insertions, 0 deletions

diff --git a/sql/rpl_mi.h b/sql/rpl_mi.h
index 260c35e8c04..54d6b5be592 100644
--- a/sql/rpl_mi.h
+++ b/sql/rpl_mi.h
@@ -327,6 +327,16 @@ class Master_info : public Slave_reporting_capability
   uint users;                                   /* Active user for object */
   uint killed;
 
+
+  /* No of DDL event group */
+  volatile uint64 total_ddl_groups;
+
+  /* No of non-transactional event group*/
+  volatile uint64 total_non_trans_groups;
+
+  /* No of transactional event group*/
+  volatile uint64 total_trans_groups;
+
   /* domain-id based filter */
   Domain_id_filter domain_id_filter;