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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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12
mysql-test/suite/encryption/r/encrypt_and_grep.result
View File

@@ -14,11 +14,11 @@ NAME
test/t3
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0;
NAME
mysql/innodb_table_stats
innodb_system
mysql/innodb_index_stats
mysql/innodb_table_stats
test/t1
test/t2
innodb_system
# t1 yes on expecting NOT FOUND
NOT FOUND /foobarsecret/ in t1.ibd
# t2 ... on expecting NOT FOUND
@@ -32,11 +32,11 @@ SET GLOBAL innodb_encrypt_tables = off;
# Wait max 10 min for key encryption threads to decrypt all spaces
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0;
NAME
mysql/innodb_table_stats
innodb_system
mysql/innodb_index_stats
mysql/innodb_table_stats
test/t2
test/t3
innodb_system
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0;
NAME
test/t1
@@ -56,11 +56,11 @@ NAME
test/t3
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0;
NAME
mysql/innodb_table_stats
innodb_system
mysql/innodb_index_stats
mysql/innodb_table_stats
test/t1
test/t2
innodb_system
# t1 yes on expecting NOT FOUND
NOT FOUND /foobarsecret/ in t1.ibd
# t2 ... on expecting NOT FOUND