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https://github.com/MariaDB/server.git
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ca0c96fc89
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.
141 lines
4.9 KiB
Plaintext
141 lines
4.9 KiB
Plaintext
SET @start_value = @@global.max_connections;
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SELECT @start_value;
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@start_value
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151
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'#--------------------FN_DYNVARS_074_01------------------------#'
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SET @@global.max_connections = 5000;
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SET @@global.max_connections = DEFAULT;
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SELECT @@global.max_connections;
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@@global.max_connections
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151
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'#---------------------FN_DYNVARS_074_02-------------------------#'
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SET @@global.max_connections = @start_value;
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SELECT @@global.max_connections = 151;
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@@global.max_connections = 151
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1
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'#--------------------FN_DYNVARS_074_03------------------------#'
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SET @@global.max_connections = 100000;
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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SET @@global.max_connections = 99999;
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SELECT @@global.max_connections;
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@@global.max_connections
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99999
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SET @@global.max_connections = 65536;
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SELECT @@global.max_connections;
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@@global.max_connections
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65536
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SET @@global.max_connections = 1;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '1'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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SET @@global.max_connections = 2;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '2'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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'#--------------------FN_DYNVARS_074_04-------------------------#'
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SET @@global.max_connections = -1;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '-1'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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SET @@global.max_connections = 100000000000;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '100000000000'
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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SET @@global.max_connections = 10000.01;
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ERROR 42000: Incorrect argument type to variable 'max_connections'
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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SET @@global.max_connections = -1024;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '-1024'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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SET @@global.max_connections = 0;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '0'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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SET @@global.max_connections = 100001;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '100001'
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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SET @@global.max_connections = ON;
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ERROR 42000: Incorrect argument type to variable 'max_connections'
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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SET @@global.max_connections = 'test';
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ERROR 42000: Incorrect argument type to variable 'max_connections'
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SELECT @@global.max_connections;
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@@global.max_connections
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100000
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'#-------------------FN_DYNVARS_074_05----------------------------#'
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SET @@session.max_connections = 4096;
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ERROR HY000: Variable 'max_connections' is a GLOBAL variable and should be set with SET GLOBAL
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SELECT @@session.max_connections;
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ERROR HY000: Variable 'max_connections' is a GLOBAL variable
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'#----------------------FN_DYNVARS_074_06------------------------#'
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SELECT @@global.max_connections = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='max_connections';
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@@global.max_connections = VARIABLE_VALUE
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1
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SELECT @@max_connections = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.SESSION_VARIABLES
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WHERE VARIABLE_NAME='max_connections';
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@@max_connections = VARIABLE_VALUE
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1
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'#---------------------FN_DYNVARS_074_07----------------------#'
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SET @@global.max_connections = TRUE;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '1'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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SET @@global.max_connections = FALSE;
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Warnings:
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Warning 1292 Truncated incorrect max_connections value: '0'
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SELECT @@global.max_connections;
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@@global.max_connections
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10
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'#---------------------FN_DYNVARS_074_08----------------------#'
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SET @@global.max_connections = 5000;
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SELECT @@max_connections = @@global.max_connections;
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@@max_connections = @@global.max_connections
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1
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'#---------------------FN_DYNVARS_074_09----------------------#'
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SET max_connections = 6000;
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ERROR HY000: Variable 'max_connections' is a GLOBAL variable and should be set with SET GLOBAL
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SELECT @@max_connections;
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@@max_connections
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5000
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SET local.max_connections = 7000;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'max_connections = 7000' at line 1
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SELECT local.max_connections;
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ERROR 42S02: Unknown table 'local' in field list
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SET global.max_connections = 8000;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'max_connections = 8000' at line 1
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SELECT global.max_connections;
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ERROR 42S02: Unknown table 'global' in field list
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SELECT max_connections = @@session.max_connections;
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ERROR 42S22: Unknown column 'max_connections' in 'field list'
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SET @@global.max_connections = @start_value;
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SELECT @@global.max_connections;
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@@global.max_connections
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151
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