Description:
When tried to repeat bug #29071 I noticed strange behavior: if set ulimit -n to some low value, then run test for bug #29071, then drop table and run show global status like '%open_files%'; value of open_files not decremented.
If no error 24 got before this value decremented.
Modified test will be uploaded shortly.
This can show problem with counters.
How to repeat:
1. Run test uploaded
2. Get results like:
set global table_open_cache=100;
show global status like '%open_files%';
Variable_name Value
Open_files 4
show global status like '%open_files%';
Variable_name Value
Open_files 202
show global status where variable_name in ('open_files');
Variable_name Value
Open_files 202
drop table if exists t90;
drop table if exists t91;
drop table if exists t92;
drop table if exists t93;
drop table if exists t94;
drop table if exists t95;
drop table if exists t96;
drop table if exists t97;
drop table if exists t98;
drop table if exists t99;
show global status like '%open_files%';
Variable_name Value
Open_files 182
show global status where variable_name in ('open_files');
Variable_name Value
Open_files 182
Notice value of Open_files decremented.
3. Set ulimit -n 159
4. Run test again
5. Get results like:
set global table_open_cache=100;
show global status like '%open_files%';
Variable_name Value
Open_files 4
show global status like '%open_files%';
Variable_name Value
Open_files 142
show global status where variable_name in ('open_files');
Variable_name Value
Open_files 142
drop table if exists t90;
drop table if exists t91;
drop table if exists t92;
drop table if exists t93;
drop table if exists t94;
drop table if exists t95;
drop table if exists t96;
drop table if exists t97;
drop table if exists t98;
drop table if exists t99;
show global status like '%open_files%';
Variable_name Value
Open_files 142
show global status where variable_name in ('open_files');
Variable_name Value
Open_files 142
