Bug #60448 | Query cache always misses with InnoDB schema with '-' in theirschema name. | ||
---|---|---|---|
Submitted: | 13 Mar 2011 4:36 | Modified: | 13 Mar 2011 11:25 |
Reporter: | Craig Pearson | Email Updates: | |
Status: | Duplicate | Impact on me: | |
Category: | MySQL Server: Query Cache | Severity: | S2 (Serious) |
Version: | 5.5.9, 5.5.11 | OS: | Any (Centos 5.5, Mac OS X) |
Assigned to: | CPU Architecture: | Any |
[13 Mar 2011 4:36]
Craig Pearson
[13 Mar 2011 9:38]
Valeriy Kravchuk
Verified just as described with current mysql-5.5 from bzr on Mac OS X: macbook-pro:5.5 openxs$ bin/mysql -uroot test Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.5.11-debug Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> create database `test-schema`; Query OK, 1 row affected (0.01 sec) mysql> create database `testschema`; Query OK, 1 row affected (0.04 sec) mysql> CREATE TABLE `test-schema`.test_innodb ( `uid` INT AUTO_INCREMENT PRIMARY KEY, -> `str` VARCHAR(255) NOT NULL ) ENGINE=InnoDB; Query OK, 0 rows affected (0.18 sec) mysql> CREATE TABLE `test-schema`.test_myisam ( `uid` INT AUTO_INCREMENT PRIMARY KEY, -> `str` VARCHAR(255) NOT NULL ) ENGINE=MYISAM; Query OK, 0 rows affected (0.07 sec) mysql> CREATE TABLE `testschema`.test_innodb ( `uid` INT AUTO_INCREMENT PRIMARY KEY, -> `str` VARCHAR(255) NOT NULL ) ENGINE=InnoDB; Query OK, 0 rows affected (0.41 sec) mysql> CREATE TABLE `testschema`.test_myisam ( `uid` INT AUTO_INCREMENT PRIMARY KEY, -> `str` VARCHAR(255) NOT NULL ) ENGINE=MYISAM; Query OK, 0 rows affected (0.07 sec) mysql> INSERT INTO `test-schema`.test_innodb (str) VALUES -> ('one'),('two'),('three'),('four'); Query OK, 4 rows affected (0.10 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> INSERT INTO `test-schema`.test_myisam (str) VALUES -> ('one'),('two'),('three'),('four'); Query OK, 4 rows affected (0.03 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> INSERT INTO `testschema`.test_innodb (str) VALUES -> ('one'),('two'),('three'),('four'); Query OK, 4 rows affected (0.00 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> INSERT INTO `testschema`.test_myisam (str) VALUES -> ('one'),('two'),('three'),('four'); Query OK, 4 rows affected (0.00 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> show variables like 'query%'; +------------------------------+---------+ | Variable_name | Value | +------------------------------+---------+ | query_alloc_block_size | 8192 | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 0 | | query_cache_type | ON | | query_cache_wlock_invalidate | OFF | | query_prealloc_size | 8192 | +------------------------------+---------+ 7 rows in set (0.00 sec) mysql> set global query_cache_size=10*1024*1024; Query OK, 0 rows affected (0.03 sec) mysql> show variables like 'query%'; +------------------------------+----------+ | Variable_name | Value | +------------------------------+----------+ | query_alloc_block_size | 8192 | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 10485760 | | query_cache_type | ON | | query_cache_wlock_invalidate | OFF | | query_prealloc_size | 8192 | +------------------------------+----------+ 7 rows in set (0.00 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10476656 | | Qcache_hits | 0 | | Qcache_inserts | 0 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 0 | | Qcache_queries_in_cache | 0 | | Qcache_total_blocks | 1 | +-------------------------+----------+ 8 rows in set (0.00 sec) mysql> SELECT * FROM `test-schema`.test_innodb; +-----+-------+ | uid | str | +-----+-------+ | 1 | one | | 2 | two | | 3 | three | | 4 | four | +-----+-------+ 4 rows in set (0.03 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10476656 | | Qcache_hits | 0 | | Qcache_inserts | 0 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 1 | | Qcache_queries_in_cache | 0 | | Qcache_total_blocks | 1 | +-------------------------+----------+ 8 rows in set (0.00 sec) mysql> SELECT * FROM `test-schema`.test_myisam; +-----+-------+ | uid | str | +-----+-------+ | 1 | one | | 2 | two | | 3 | three | | 4 | four | +-----+-------+ 4 rows in set (0.00 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10475120 | | Qcache_hits | 0 | | Qcache_inserts | 1 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 1 | | Qcache_queries_in_cache | 1 | | Qcache_total_blocks | 4 | +-------------------------+----------+ 8 rows in set (0.00 sec) mysql> SELECT * FROM `testschema`.test_innodb; +-----+-------+ | uid | str | +-----+-------+ | 1 | one | | 2 | two | | 3 | three | | 4 | four | +-----+-------+ 4 rows in set (0.00 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10473584 | | Qcache_hits | 0 | | Qcache_inserts | 2 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 1 | | Qcache_queries_in_cache | 2 | | Qcache_total_blocks | 7 | +-------------------------+----------+ 8 rows in set (0.00 sec) mysql> SELECT * FROM `test-schema`.test_innodb; +-----+-------+ | uid | str | +-----+-------+ | 1 | one | | 2 | two | | 3 | three | | 4 | four | +-----+-------+ 4 rows in set (0.00 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10473584 | | Qcache_hits | 0 | | Qcache_inserts | 2 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 2 | | Qcache_queries_in_cache | 2 | | Qcache_total_blocks | 7 | +-------------------------+----------+ 8 rows in set (0.00 sec) mysql> SELECT * FROM `testschema`.test_innodb; +-----+-------+ | uid | str | +-----+-------+ | 1 | one | | 2 | two | | 3 | three | | 4 | four | +-----+-------+ 4 rows in set (0.00 sec) mysql> SHOW GLOBAL STATUS LIKE 'Qcache%'; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 10473584 | | Qcache_hits | 1 | | Qcache_inserts | 2 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 2 | | Qcache_queries_in_cache | 2 | | Qcache_total_blocks | 7 | +-------------------------+----------+ 8 rows in set (0.00 sec)
[13 Mar 2011 11:25]
Davi Arnaut
Closed as a duplicate of Bug#55556.