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57 lines
1.8 KiB
Text
57 lines
1.8 KiB
Text
--echo #
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--echo # Bug#12427262 : 60961: SHOW TABLES VERY SLOW WHEN NOT IN SYSTEM DISK CACHE.
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--echo #
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--source include/not_embedded.inc
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--source include/have_perfschema.inc
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--disable_warnings
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create database show_table_lw_db;
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use show_table_lw_db;
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create table t1 (c1 int);
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create table t2 (c1 int);
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create table t3 (c1 int);
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create table t4 (c1 int);
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create table t5 (c1 int);
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create table t6 (c1 int);
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create table t7 (c1 int);
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create table t8 (c1 int);
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create table t9 (c1 int);
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create table t10 (c1 int);
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--enable_warnings
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--disable_cursor_protocol
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# Query PS to know initial read count for frm file.
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--enable_prepare_warnings
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select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
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like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
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into @count_read_before;
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show tables;
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# Query PS to know read count for frm file after above query. It should
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# not be changed as FRM file will not be opened for above query.
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select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
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like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
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into @count_read_after;
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--enable_cursor_protocol
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select @count_read_after-@count_read_before;
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show full tables;
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--disable_cursor_protocol
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# Query PS to know read count for frm file after above query. COUNT_READ
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# will be incremented by 1 as FRM file will be opened for above query.
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select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
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like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
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into @count_read_after;
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--enable_cursor_protocol
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select @count_read_after-@count_read_before;
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--disable_prepare_warnings
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--disable_warnings
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drop table t1;
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drop database show_table_lw_db;
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--enable_warnings
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