False impression on key buffer usage

#573
2022-03-11 09:42:01 +01:00 · 2022-03-11 09:42:01 +01:00 · dd9914be88
commit dd9914be88
parent cc4fa414d2
1 changed files with 7 additions and 0 deletions
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@ -3587,6 +3587,13 @@ sub mysql_myisam {
        infoprint "MyISAM Metrics are disabled on last MySQL versions.";
        return;
    }
+    my $nb_myisam_tables=select_one(
+"SELECT COUNT(*) FROM information_schema.TABLES WHERE ENGINE='MyISAM'"
+              );
+    if ( $nb_myisam_tables == 0 ) {
+        infoprint "No MyISAM table(s) detected ....";
+        return;
+    }

    # Key buffer usage
    if ( $mycalc{'pct_key_buffer_used'} > 0 ) {