mirror of
https://github.com/MariaDB/server.git
synced 2025-01-21 06:22:28 +01:00
24 lines
969 B
Text
24 lines
969 B
Text
flush status;
|
|
set query_cache_type=DEMAND;
|
|
set global query_cache_size= 1024*1024*512;
|
|
drop table if exists t1;
|
|
create table t1 (a varchar(100));
|
|
insert into t1 values ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
|
|
Activate debug hook and attempt to retrieve the statement from the cache.
|
|
set session debug='+d,wait_in_query_cache_insert';
|
|
select SQL_CACHE * from t1;;
|
|
On a second connection; clear the query cache.
|
|
show status like 'Qcache_queries_in_cache';
|
|
Variable_name Value
|
|
Qcache_queries_in_cache 1
|
|
set global query_cache_size= 0;
|
|
Signal the debug hook to release the lock.
|
|
select id from information_schema.processlist where state='wait_in_query_cache_insert' into @thread_id;
|
|
kill query @thread_id;
|
|
Show query cache status.
|
|
show status like 'Qcache_queries_in_cache';
|
|
Variable_name Value
|
|
Qcache_queries_in_cache 0
|
|
set global query_cache_size= 0;
|
|
use test;
|
|
drop table t1;
|