From: Rafał Radecki
Date: December 13 2012 10:22am
Subject: Semisynchrounous replication - how to clear Rpl_semi_sync_master_no_tx/_times.
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Hi all.

I would like to clear values off Rpl_semi_sync_master_no_tx and
Rpl_semi_sync_master_no_times status variables because I am plugging a
sync replication setup into nagios.
I've tried:
mysql> SET global Rpl_semi_sync_master_no_tx=0;
ERROR 1193 (HY000): Unknown system variable 'Rpl_semi_sync_master_no_tx'
mysql> SET global Rpl_semi_sync_master_no_times=0;
ERROR 1193 (HY000): Unknown system variable 'Rpl_semi_sync_master_no_times'

Is there a way to clear these counters?

Best regards,
Rafal Radecki.