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Adjust table_open_cache to avoid getting error 24 (too many open files)

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MDEV--15609 engines/funcs.crash_manytables_number crashes with error 24
           (too many open files)
MDEV-10286  Adjustment of table_open_cache according to system limits
            does not work when open-files-limit option is provided

Fixed by adjusting tc_size downwards if there is not enough file
descriptors to use.

Other changes:
- Ensure that there is 30 (was 10) extra file descriptors for other usage
- Decrease TABLE_OPEN_CACHE_MIN to 200 as it's better to have a smaller
  table cache than getting error 24
- Increase minimum of max_connections and table_open_cache from 1 to 10
  as 1 is not usable for any real application, only for testing.
This commit is contained in:
Monty
2018-03-22 20:03:54 +02:00
parent 4d83b01537
commit ca0c96fc89
29 changed files with 193 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
mysql-test/suite/sys_vars/r/table_open_cache_basic.result
View File

@ -1,7 +1,7 @@
SET @start_value = @@global.table_open_cache ;
SELECT @start_value;
@start_value
2000
421
'#--------------------FN_DYNVARS_001_01------------------------#'
SET @@global.table_open_cache = 99;
SET @@global.table_open_cache = DeFAULT;
@ -15,13 +15,17 @@ SELECT @@global.table_open_cache = 400;
0
'#--------------------FN_DYNVARS_001_03------------------------#'
SET @@global.table_open_cache = 8;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '8'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
8
10
SET @@global.table_open_cache = 1;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '1'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
SET @@global.table_open_cache = 1073741824;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '1073741824'
@ -42,7 +46,7 @@ Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '-1'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
SET @@global.table_open_cache = 100000000000;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '100000000000'
@ -54,13 +58,13 @@ Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '-1024'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
SET @@global.table_open_cache = 0;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '0'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
SET @@global.table_open_cache = 10000.01;
ERROR 42000: Incorrect argument type to variable 'table_open_cache'
SET @@global.table_open_cache = ON;
@ -78,15 +82,17 @@ SELECT @@global.table_open_cache = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL
1
'#---------------------FN_DYNVARS_001_09----------------------#'
SET @@global.table_open_cache = TRUE;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '1'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
SET @@global.table_open_cache = FALSE;
Warnings:
Warning 1292 Truncated incorrect table_open_cache value: '0'
SELECT @@global.table_open_cache ;
@@global.table_open_cache
1
10
'#---------------------FN_DYNVARS_001_10----------------------#'
SET @@global.table_open_cache = 10;
SELECT @@table_open_cache = @@global.table_open_cache ;
@ -104,4 +110,4 @@ ERROR 42S22: Unknown column 'table_open_cache' in 'field list'
SET @@global.table_open_cache = @start_value;
SELECT @@global.table_open_cache ;
@@global.table_open_cache
2000
421