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Current File : /www/server/mysql/mysql-test/t/bug12427262.test

--echo #
--echo # Bug#12427262 : 60961: SHOW TABLES VERY SLOW WHEN NOT IN SYSTEM DISK CACHE. 
--echo #

--source include/not_embedded.inc
--source include/have_perfschema.inc

--disable_warnings
create database show_table_lw_db;
use show_table_lw_db;
create table t1 (c1 int);
create table t2 (c1 int);
create table t3 (c1 int);
create table t4 (c1 int);
create table t5 (c1 int);
create table t6 (c1 int);
create table t7 (c1 int);
create table t8 (c1 int);
create table t9 (c1 int);
create table t10 (c1 int);
--enable_warnings

# Query PS to know initial read count for frm file.
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME 
like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
into @count_read_before;

show tables;

# Query PS to know read count for frm file after above query. It should
# not be changed as FRM file will not be opened for above query.
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME 
like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
into @count_read_after;

select @count_read_after-@count_read_before;

show full tables;

# Query PS to know read count for frm file after above query. COUNT_READ
# will be incremented by 1 as FRM file will be opened for above query.
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME 
like "%show_table_lw_db%" AND FILE_NAME like "%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM'
into @count_read_after;

select @count_read_after-@count_read_before;

--disable_warnings
drop table t1;
drop database show_table_lw_db;
--enable_warnings

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