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| author | Sergey Vojtovich <svoj@mariadb.org> | 2015-04-22 13:29:56 +0400 |
|---|---|---|
| committer | Sergey Vojtovich <svoj@mariadb.org> | 2015-05-13 15:56:56 +0400 |
| commit | b22959903b89e798f8804ec9a815c88f75915cd9 (patch) | |
| tree | 8b3443332de3bea57ced828a7932ade4add36ce0 /sql/opt_subselect.cc | |
| parent | 8345bc692192788c25ec004134a3a095437aeb1c (diff) | |
| download | mariadb-git-b22959903b89e798f8804ec9a815c88f75915cd9.tar.gz | |
MDEV-7943 - pthread_getspecific() takes 0.76% in OLTP RO
Added THD argument to select_result and all derivative classes.
This reduces number of pthread_getspecific calls from 796 to 776 per OLTP RO
transaction.
Diffstat (limited to 'sql/opt_subselect.cc')
| -rw-r--r-- | sql/opt_subselect.cc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sql/opt_subselect.cc b/sql/opt_subselect.cc index 9804254b35f..167194df785 100644 --- a/sql/opt_subselect.cc +++ b/sql/opt_subselect.cc @@ -5104,8 +5104,8 @@ TABLE *create_dummy_tmp_table(THD *thd) class select_value_catcher :public select_subselect { public: - select_value_catcher(Item_subselect *item_arg) - :select_subselect(item_arg) + select_value_catcher(THD *thd_arg, Item_subselect *item_arg): + select_subselect(thd_arg, item_arg) {} int send_data(List<Item> &items); int setup(List<Item> *items); @@ -5216,7 +5216,8 @@ bool setup_jtbm_semi_joins(JOIN *join, List<TABLE_LIST> *join_list, subselect_single_select_engine *engine= (subselect_single_select_engine*)subq_pred->engine; select_value_catcher *new_sink; - if (!(new_sink= new select_value_catcher(subq_pred))) + if (!(new_sink= + new (join->thd->mem_root) select_value_catcher(join->thd, subq_pred))) DBUG_RETURN(TRUE); if (new_sink->setup(&engine->select_lex->join->fields_list) || engine->select_lex->join->change_result(new_sink, NULL) || |