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# innodb_buffer_pool_load_incomplete defaults 0
SELECT variable_name, variable_value
FROM information_schema.global_status
WHERE LOWER(variable_name) = 'innodb_buffer_pool_load_incomplete';
variable_name variable_value
INNODB_BUFFER_POOL_LOAD_INCOMPLETE OFF
# 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
);
SET GLOBAL innodb_buffer_pool_dump_now=1;
# Restart server
# restart
# Abort after 16 pages
SET GLOBAL innodb_buffer_pool_load_pages_abort=16,
GLOBAL innodb_buffer_pool_load_now=1,
GLOBAL innodb_buffer_pool_dump_at_shutdown=1;
SELECT variable_name, SUBSTR(variable_value, 1, 38) as VALUE
FROM information_schema.global_status
WHERE LOWER(variable_name) IN ('innodb_buffer_pool_load_incomplete','innodb_buffer_pool_load_status')
ORDER BY variable_name;
variable_name VALUE
INNODB_BUFFER_POOL_LOAD_INCOMPLETE ON
INNODB_BUFFER_POOL_LOAD_STATUS Buffer pool(s) load aborted on request
# Restart server
# restart
# Load buffer pool
SET GLOBAL innodb_buffer_pool_load_now=1;
# Should be more than previous as we didn't overwrite our save file
select count(*) > Previous_loaded as Loaded_more from information_schema.INNODB_BUFFER_PAGE WHERE PAGE_TYPE='BLOB' group by PAGE_TYPE;;
Loaded_more
1
# Successful, so innodb_buffer_pool_load_incomplete should be FALSE
SELECT variable_name, SUBSTR(variable_value, 1, 33) as VALUE
FROM information_schema.global_status
WHERE LOWER(variable_name) IN ('innodb_buffer_pool_load_incomplete','innodb_buffer_pool_load_status')
ORDER BY variable_name;
variable_name VALUE
INNODB_BUFFER_POOL_LOAD_INCOMPLETE OFF
INNODB_BUFFER_POOL_LOAD_STATUS Buffer pool(s) load completed at
# innodb_buffer_pool_dump_now=1 should reset the innodb_buffer_pool_load_incomplete status
SET GLOBAL innodb_buffer_pool_dump_now=1;
SELECT variable_name, SUBSTR(variable_value, 1, 33) as VALUE
FROM information_schema.global_status
WHERE LOWER(variable_name) IN ('innodb_buffer_pool_load_incomplete', 'innodb_buffer_pool_dump_status');
variable_name VALUE
INNODB_BUFFER_POOL_DUMP_STATUS Buffer pool(s) dump completed at
INNODB_BUFFER_POOL_LOAD_INCOMPLETE OFF
# Restart server
# restart
# Load buffer pool
SET GLOBAL innodb_buffer_pool_load_now=1;
# Should be same amount
select abs(Previously_dumped - count(*)) <= 2 as Loaded_about_same_size from information_schema.INNODB_BUFFER_PAGE WHERE PAGE_TYPE='BLOB' group by PAGE_TYPE;;
Loaded_about_same_size
1
# Clean up
DROP TABLE t1;
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