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54 lines
1.5 KiB
Text
54 lines
1.5 KiB
Text
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#
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# Bug#12427262 : 60961: SHOW TABLES VERY SLOW WHEN NOT IN SYSTEM DISK CACHE.
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#
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create database show_table_db;
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use show_table_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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select Sum(ALL(COUNT_READ)) from performance_schema.file_summary_by_instance where FILE_NAME
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like "%show_table_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_before;
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show tables;
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Tables_in_show_table_db
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t1
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t10
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t2
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t3
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t4
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t5
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t6
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t7
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t8
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t9
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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_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_after;
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select @count_read_after-@count_read_before;
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@count_read_after-@count_read_before
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0.000000000000000000000000000000
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show full tables;
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Tables_in_show_table_db Table_type
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t1 BASE TABLE
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t10 BASE TABLE
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t2 BASE TABLE
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t3 BASE TABLE
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t4 BASE TABLE
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t5 BASE TABLE
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t6 BASE TABLE
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t7 BASE TABLE
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t8 BASE TABLE
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t9 BASE TABLE
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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_db/%.frm%" AND EVENT_NAME='wait/io/file/sql/FRM' into @count_read_after;
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select @count_read_after-@count_read_before;
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@count_read_after-@count_read_before
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10.000000000000000000000000000000
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drop table t1;
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drop database show_table_db;
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