ANALYSIS:
=========
If a slave instance use sysvar_session_track_gtids ==
OWN_GTID and with MTS enabled, the slave will lag behind
master and its performance degrades over time.

Each slave worker adds its own gtid into its
Session_consistency_gtids_ctx.m_gtid_set during each
transaction commit. Overtime, the
Session_consistency_gtids_ctx.m_gtid_set may have
gno_interval in millions and thus will take long time to
insert a gtid into Session_consistency_gtids_ctx.m_gtid_set.
This causes the lag/performance degrade.

FIX:
====
Disable tracking GTIDs for slave threads.

Note:
=====
This patch is based on a contribution by Facebook.

RB#25006