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SET @orig = @@global.innodb_buffer_pool_dump_pct;
SELECT @orig;
@orig
25
SET GLOBAL innodb_buffer_pool_dump_pct=3;
# Do the dump
SELECT @@global.innodb_buffer_pool_dump_now;
SELECT variable_value INTO @old_dump_status FROM information_schema.global_status
WHERE LOWER(variable_name) = 'innodb_buffer_pool_dump_status';
SET GLOBAL innodb_buffer_pool_dump_now = ON;
SELECT @@global.innodb_buffer_pool_dump_now;
SET GLOBAL innodb_buffer_pool_dump_pct=20;
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
20
SET GLOBAL innodb_buffer_pool_dump_pct=1;
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
1
SET GLOBAL innodb_buffer_pool_dump_pct=100;
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
100
SET GLOBAL innodb_buffer_pool_dump_pct=101;
Warnings:
Warning 1292 Truncated incorrect innodb_buffer_pool_dump_pct value: '101'
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
100
SET GLOBAL innodb_buffer_pool_dump_pct=-1;
Warnings:
Warning 1292 Truncated incorrect innodb_buffer_pool_dump_pct value: '-1'
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
1
SET GLOBAL innodb_buffer_pool_dump_pct=Default;
SELECT @@global.innodb_buffer_pool_dump_pct;
@@global.innodb_buffer_pool_dump_pct
25
SET GLOBAL innodb_buffer_pool_dump_pct='foo';
ERROR 42000: Incorrect argument type to variable 'innodb_buffer_pool_dump_pct'
SET innodb_buffer_pool_dump_pct=50;
ERROR HY000: Variable 'innodb_buffer_pool_dump_pct' is a GLOBAL variable and should be set with SET GLOBAL
SET GLOBAL innodb_buffer_pool_dump_pct=@orig;
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