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BUG#12427262 : 60961: SHOW TABLES VERY SLOW WHEN NOT IN SYSTEM DISK CACHE

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Details:
- Merge : 5.1 -> 5.5
- Addded a new test case which was not added in 5.1 because PS was
  not there in 5.1.
This commit is contained in:
Mayank Prasad
2012-04-19 15:59:46 +05:30
parent cf162c762e 5203d9bb98
commit 2786a6e232
3 changed files with 138 additions and 31 deletions
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53
mysql-test/r/bug12427262.result Normal file
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#
# Bug#12427262 : 60961: SHOW TABLES VERY SLOW WHEN NOT IN SYSTEM DISK CACHE.
#
create database show_table_db;
use show_table_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);
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
like "%show_table_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_before;
show tables;
Tables_in_show_table_db
t1
t10
t2
t3
t4
t5
t6
t7
t8
t9
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
like "%show_table_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_after;
select @count_read_after-@count_read_before;
@count_read_after-@count_read_before
0.000000000000000000000000000000
show full tables;
Tables_in_show_table_db Table_type
t1 BASE TABLE
t10 BASE TABLE
t2 BASE TABLE
t3 BASE TABLE
t4 BASE TABLE
t5 BASE TABLE
t6 BASE TABLE
t7 BASE TABLE
t8 BASE TABLE
t9 BASE TABLE
select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
like "%show_table_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_after;
select @count_read_after-@count_read_before;
@count_read_after-@count_read_before
10.000000000000000000000000000000
drop table t1;
drop database show_table_db;