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MDEV-7943 - pthread_getspecific() takes 0.76% in OLTP RO

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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.
This commit is contained in:
Sergey Vojtovich
2015-04-22 13:29:56 +04:00
parent 8345bc6921
commit b22959903b
18 changed files with 149 additions and 127 deletions
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57
sql/sql_parse.cc
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@ -3364,13 +3364,13 @@ mysql_execute_command(THD *thd)
select_create is currently not re-execution friendly and
needs to be created for every execution of a PS/SP.
*/
if ((result= new select_create(create_table,
&create_info,
&alter_info,
select_lex->item_list,
lex->duplicates,
lex->ignore,
select_tables)))
if ((result= new (thd->mem_root) select_create(thd, create_table,
&create_info,
&alter_info,
select_lex->item_list,
lex->duplicates,
lex->ignore,
select_tables)))
{
/*
CREATE from SELECT give its SELECT_LEX for SELECT,
@ -3934,13 +3934,14 @@ end_with_restore_list:
select_lex->context.table_list=
select_lex->context.first_name_resolution_table= second_table;
res= mysql_insert_select_prepare(thd);
if (!res && (sel_result= new select_insert(first_table,
first_table->table,
&lex->field_list,
&lex->update_list,
&lex->value_list,
lex->duplicates,
lex->ignore)))
if (!res && (sel_result= new (thd->mem_root) select_insert(thd,
first_table,
first_table->table,
&lex->field_list,
&lex->update_list,
&lex->value_list,
lex->duplicates,
lex->ignore)))
{
if (lex->analyze_stmt)
((select_result_interceptor*)sel_result)->disable_my_ok_calls();
@ -4009,14 +4010,15 @@ end_with_restore_list:
Actually, it is ANALYZE .. DELETE .. RETURNING. We need to produce
output and then discard it.
*/
sel_result= new select_send_analyze();
sel_result= new (thd->mem_root) select_send_analyze(thd);
replaced_protocol= true;
save_protocol= thd->protocol;
thd->protocol= new Protocol_discard(thd);
}
else
{
if (!(sel_result= lex->result) && !(sel_result= new select_send()))
if (!(sel_result= lex->result) &&
!(sel_result= new (thd->mem_root) select_send(thd)))
return 1;
}
}
@ -4073,7 +4075,8 @@ end_with_restore_list:
if (!thd->is_fatal_error)
{
result= new multi_delete(aux_tables, lex->table_count);
result= new (thd->mem_root) multi_delete(thd, aux_tables,
lex->table_count);
if (result)
{
res= mysql_select(thd, &select_lex->ref_pointer_array,
@ -5710,7 +5713,7 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables)
to prepend EXPLAIN to any query and receive output for it,
even if the query itself redirects the output.
*/
if (!(result= new select_send()))
if (!(result= new (thd->mem_root) select_send(thd)))
return 1; /* purecov: inspected */
thd->send_explain_fields(result, lex->describe, lex->analyze_stmt);
@ -5768,14 +5771,14 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables)
else
{
DBUG_ASSERT(thd->protocol);
result= new select_send_analyze();
result= new (thd->mem_root) select_send_analyze(thd);
save_protocol= thd->protocol;
thd->protocol= new Protocol_discard(thd);
}
}
else
{
if (!result && !(result= new (thd->mem_root) select_send()))
if (!result && !(result= new (thd->mem_root) select_send(thd)))
return 1; /* purecov: inspected */
}
query_cache_store_query(thd, all_tables);
@ -8222,23 +8225,25 @@ Comp_creator *comp_ne_creator(bool invert)
@return
constructed Item (or 0 if out of memory)
*/
Item * all_any_subquery_creator(Item *left_expr,
Item * all_any_subquery_creator(THD *thd, Item *left_expr,
chooser_compare_func_creator cmp,
bool all,
SELECT_LEX *select_lex)
{
if ((cmp == &comp_eq_creator) && !all) // = ANY <=> IN
return new Item_in_subselect(left_expr, select_lex);
return new (thd->mem_root) Item_in_subselect(thd, left_expr, select_lex);
if ((cmp == &comp_ne_creator) && all) // <> ALL <=> NOT IN
return new Item_func_not(new Item_in_subselect(left_expr, select_lex));
return new (thd->mem_root) Item_func_not(
new (thd->mem_root) Item_in_subselect(thd, left_expr, select_lex));
Item_allany_subselect *it=
new Item_allany_subselect(left_expr, cmp, select_lex, all);
new (thd->mem_root) Item_allany_subselect(thd, left_expr, cmp, select_lex,
all);
if (all)
return it->upper_item= new Item_func_not_all(it); /* ALL */
return it->upper_item= new (thd->mem_root) Item_func_not_all(it); /* ALL */
return it->upper_item= new Item_func_nop_all(it); /* ANY/SOME */
return it->upper_item= new (thd->mem_root) Item_func_nop_all(it); /* ANY/SOME */
}