MySQL-InnoDBCluster/IC_admin_sql.txt at main · khollman5/MySQL-InnoDBCluster · GitHub

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###########
# Changing anything? Be careful:
set SQL_LOG_BIN=0;
 alter table ... ;
 alter user ... ;
set SQL_LOG_BIN=1;

###########
# Status overview:
\sql
 SELECT * FROM performance_schema.replication_group_members\G

select member_host, member_state, member_role, TRANSACTIONS_COMMITTED_ALL_MEMBERS
from performance_schema.replication_group_members a, performance_schema.replication_group_member_stats b
where a.MEMBER_ID = b.MEMBER_ID ;


###########
# RW or RO?
select @@super_read_only;

###########
# Configuration options:
#

# Be aware of parameters:
 my.cnf:	mysqld.max_connections
 myrouter.conf: myrouter.max_connect_errors
set persist max_connections=100000;

# my.cnf:
# show global variables like 'group_replication%';

set persist group_replication_autorejoin_tries=3 ;
set persist group_replication_exit_state_action='OFFLINE_MODE';
set persist group_replication_member_expel_timeout=5 ;
# my.cnf & restart:
set persist group_replication_consistency='BEFORE_ON_PRIMARY_FAILOVER'
 (SET @@GLOBAL.group_replication_consistency= 'BEFORE_ON_PRIMARY_FAILOVER';)
 (SET @@SESSION.group_replication_consistency= 'BEFORE_ON_PRIMARY_FAILOVER';)

# Check the following:
 group_replication_member_weight
 group_replication_single_primary_mode

# View all changed params:
SELECT * FROM performance_schema.variables_info WHERE variable_source != 'COMPILED';


###########
# Flow Control tuning:
#
# There are also two configuration options related to this at their disposal today :
1. https://dev.mysql.com/doc/refman/5.7/en/group-replication-options.html#sysvar_group_replication_transaction_size_limit
group_replication_transaction_size_limit = 10485760
2. https://dev.mysql.com/doc/refman/5.7/en/group-replication-options.html#sysvar_group_replication_compression_threshold
group_replication_compression_threshold = 10240

group_replication_flow_control_certifier_threshold = 25000000
group_replication_flow_control_applier_threshold = 25000000


###########
# Conflict monitoring:
#
select COUNT_CONFLICTS_DETECTED from performance_schema.replication_group_member_stats;