diff options
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 3a4871875e5..22d017fe345 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -1942,6 +1942,19 @@ Sys_var_last_gtid::session_value_ptr(THD *thd, const LEX_CSTRING *base) } +static Sys_var_uint Sys_gtid_cleanup_batch_size( + "gtid_cleanup_batch_size", + "Normally does not need tuning. How many old rows must accumulate in " + "the mysql.gtid_slave_pos table before a background job will be run to " + "delete them. Can be increased to reduce number of commits if " + "using many different engines with --gtid_pos_auto_engines, or to " + "reduce CPU overhead if using a huge number of different " + "gtid_domain_ids. Can be decreased to reduce number of old rows in the " + "table.", + GLOBAL_VAR(opt_gtid_cleanup_batch_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,2147483647), DEFAULT(64), BLOCK_SIZE(1)); + + static bool check_slave_parallel_threads(sys_var *self, THD *thd, set_var *var) { |