diff options
Diffstat (limited to 'sql/mysqld.cc')
| -rw-r--r-- | sql/mysqld.cc | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 16353e6f0f3..592ae3e755a 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -5047,7 +5047,8 @@ enum options_mysqld OPT_SECURE_FILE_PRIV, OPT_KEEP_FILES_ON_CREATE, OPT_INNODB_ADAPTIVE_HASH_INDEX, - OPT_FEDERATED + OPT_FEDERATED, + OPT_INNODB_USE_LEGACY_CARDINALITY_ALGORITHM }; @@ -5354,6 +5355,14 @@ Disable with --skip-innodb-doublewrite.", (gptr*) &innobase_use_doublewrite, (gptr*) &global_system_variables.innodb_table_locks, (gptr*) &global_system_variables.innodb_table_locks, 0, GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0}, + {"innodb_use_legacy_cardinality_algorithm", + OPT_INNODB_USE_LEGACY_CARDINALITY_ALGORITHM, + "Use legacy algorithm for picking random pages during index cardinality " + "estimation. Disable this to use a better algorithm, but note that your " + "query plans may change (enabled by default).", + (gptr*) &srv_use_legacy_cardinality_algorithm, + (gptr*) &srv_use_legacy_cardinality_algorithm, + 0, GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0}, #endif /* End HAVE_INNOBASE_DB */ {"isam", OPT_ISAM, "Obsolete. ISAM storage engine is no longer supported.", (gptr*) &opt_isam, (gptr*) &opt_isam, 0, GET_BOOL, NO_ARG, 0, 0, 0, |