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MDEV-11984 Avoid accessing SYS_TABLESPACES unnecessarily

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The following INFORMATION_SCHEMA views were unnecessarily retrieving
the data from the SYS_TABLESPACES table instead of directly fetching
it from the fil_system cache:

information_schema.innodb_tablespaces_encryption
information_schema.innodb_tablespaces_scrubbing

InnoDB always loads all tablespace metadata into memory at startup
and never evicts it while the tablespace exists.

With this fix, accessing these views will be much faster and use less
memory, and include data about all tablespaces, including undo
tablespaces.

The view information_schema.innodb_sys_tablespaces will still reflect
the contents of the SYS_TABLESPACES table.
This commit is contained in:
Marko Mäkelä
2018-03-22 11:26:38 +02:00
parent b98d80eb84
commit 2fb31821de
7 changed files with 95 additions and 166 deletions
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2
mysql-test/suite/encryption/t/innodb-spatial-index.test
View File

@ -69,7 +69,9 @@ INSERT INTO t2 values(1, 'secret', ST_GeomFromText('POINT(903994614 180726515)')
--echo # Success!
--sorted_result
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION > 0;
--sorted_result
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0;
DROP TABLE t1, t2;