add checks for wsrep_slave_FK_check and innodb_autoinc_lock_mode when wsrep_slave_threads > 1

Author: jfcoz

mysqltuner.pl

@@ -31,6 +31,7 @@
 # Simon Greenaway Adam Stein Isart Montane
 # Baptiste M. Cole Turner Major Hayden
 # Joe Ashcraft Jean-Marie Renouard Christian Loos
+# Julien Francoz
 #
 # Inspired by Matthew Montgomery's tuning-primer.sh script:
 # http://forge.mysql.com/projects/view.php?id=44
@@ -5044,9 +5045,24 @@ sub mariadb_galera {
  if (get_wsrep_option('wsrep_slave_threads') > `nproc`*4 or get_wsrep_option('wsrep_slave_threads') < `nproc`*3) {
  badprint "wsrep_slave_threads is not equal to 3 or 4 times number of CPU(s)";
  push @adjvars, "wsrep_slave_threads= Nb of Core CPU * 4";
-  } else {
+ } else {
  goodprint "wsrep_slave_threads is equal to 3 or 4 times number of CPU(s)";
- }
+ }
+
+ if ($myvar{'wsrep_slave_threads'} > 1) {
+badprint "wsrep parallel slave can cause frequent inconsistency crash.";
+ push @adjvars, "Set wsrep_slave_threads to 1 in case of HA_ERR_FOUND_DUPP_KEY crash on slave";
+ # check options for parallel slave
+ if ($myvar{'wsrep_slave_FK_checks'} eq "OFF") {
+ badprint "wsrep_slave_FK_checks is off with parallel slave";
+ push @adjvars, "wsrep_slave_FK_checks should be ON when using parallel slave";
+ }
+# wsrep_slave_UK_checks seems useless in MySQL source code
+ if ($myvar{'innodb_autoinc_lock_mode'} != 2) {
+ badprint "innodb_autoinc_lock_mode is incorrect with parallel slave";
+ push @adjvars, "innodb_autoinc_lock_mode should be 2 when using parallel slave";
+ }
+ }
 
  if (get_wsrep_option('gcs.limit') != get_wsrep_option('wsrep_slave_threads') *5 ) {
  badprint "gcs.limit should be equal to 5 * wsrep_slave_threads";