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# populate with data
CREATE TABLE t1 (
c01 blob, c02 blob, c03 blob, c04 blob, c05 blob,
c06 blob, c07 blob, c08 blob, c09 blob, c10 blob,
c11 blob, c12 blob, c13 blob, c14 blob, c15 blob,
c16 blob, c17 blob, c18 blob, c19 blob, c20 blob,
c21 blob, c22 blob, c23 blob, c24 blob, c25 blob,
c26 blob, c27 blob, c28 blob, c29 blob, c30 blob,
c31 blob, c32 blob, c33 blob, c34 blob, c35 blob,
c36 blob, c37 blob, c38 blob, c39 blob, c40 blob,
c41 blob, c42 blob, c43 blob, c44 blob, c45 blob,
c46 blob, c47 blob, c48 blob, c49 blob, c50 blob,
c51 blob, c52 blob, c53 blob, c54 blob, c55 blob,
c56 blob, c57 blob, c58 blob, c59 blob, c60 blob,
c61 blob, c62 blob, c63 blob, c64 blob
) ROW_FORMAT=dynamic;
SET @a = repeat('a', 16 * 1024);
INSERT INTO t1 VALUES (@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a,@a,
@a,@a,@a,@a
);
insert into t1 select * from t1;
SET GLOBAL innodb_buffer_pool_dump_pct=25,GLOBAL innodb_fast_shutdown=0, GLOBAL innodb_buffer_pool_dump_at_shutdown=1;
# Restart server
SET GLOBAL innodb_buffer_pool_load_now=1;
# Case 1: Limit from innodb_buffer_pool_dump_pct
SELECT 256 as 'Previous pool pages',
ROUND(25 / 100 * @@innodb_buffer_pool_size / @@innodb_page_size) as 'Limit',
128 as 'Pages saved';
Previous pool pages Limit Pages saved
256 128 128
# Case 2: blog_pages is the minimum.
# load buffer pool with entire table.
select * from t1;
SET GLOBAL innodb_buffer_pool_dump_pct=75, global innodb_buffer_pool_dump_at_shutdown=1;
# Restart server
SET GLOBAL innodb_buffer_pool_load_now=1;
# now loaded
SELECT 256 as 'Previous pool pages',
ROUND(75 / 100 * @@innodb_buffer_pool_size / @@innodb_page_size) as 'Limit',
256 as 'Pages saved';
Previous pool pages Limit Pages saved
256 384 256
DROP TABLE t1;
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