Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.1
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None
Description
Data comes from Sandy Bridge system running sysbench OLTP RO in 1 thread against 1 table.
Call graphs:
- 0.26% mysqld mysqld
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- Item_func::type() const
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+ 18.31% JOIN::optimize_inner()
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+ 17.94% MYSQLparse(THD*)
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+ 11.70% update_ref_and_keys(THD*, st_dynamic_array*, st_join_table*, unsigned int, Item*, unsigned long long, st_select_lex*, st_sargable_param**) [clone .isra.253]
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+ 10.26% build_equal_items(JOIN*, Item*, COND_EQUAL*, List<TABLE_LIST>*, bool, COND_EQUAL**, bool) [clone .constprop.262]
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+ 6.81% internal_remove_eq_conds(THD*, Item*, Item::cond_result*)
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+ 5.92% JOIN::prepare(Item***, TABLE_LIST*, unsigned int, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*)
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+ 5.32% join_read_const_table(st_join_table*, st_position*) [clone .isra.248]
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+ 4.84% JOIN::optimize()
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+ 3.57% make_join_statistics(JOIN*, List<TABLE_LIST>&, st_dynamic_array*)
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+ 3.01% SQL_SELECT::test_quick_select(THD*, Bitmap<64u>, unsigned long long, unsigned long long, bool, bool, bool)
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+ 3.00% remove_eq_conds(THD*, Item*, Item::cond_result*)
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+ 2.92% Item_func::compile(bool (Item::*)(unsigned char**), unsigned char**, Item* (Item::*)(unsigned char*), unsigned char*)
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+ 2.52% Item_equal::add_const(Item*, Item*)
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+ 2.01% Item_func::setup_args_and_comparator(THD*, Arg_comparator*)
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+ 1.31% make_join_select(JOIN*, SQL_SELECT*, Item*)
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This is virtual method which can't be inlined. Most time spent for function call convention. Check if we can revoke it's virtual status.
Attachments
Issue Links
- is blocked by
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- Closed
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