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WL#2269 Enable query cache for NDB

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- Added a thread that fetches commit_count for open tables. This
will mean that NDB will not have to be contacted for every use of a cached query.
This commit is contained in:
msvensson@neptunus.homeip.net
2005-02-01 15:43:08 +01:00
parent cb7524e103
commit efd5ed2f9e
8 changed files with 708 additions and 74 deletions
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193
mysql-test/r/ndb_cache2.result Normal file
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drop table if exists t1;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=5;
reset query cache;
flush status;
CREATE TABLE t1 ( pk int not null primary key,
a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
insert into t1 value (1, 2, 3, 'First row');
select * from t1;
pk a b c
1 2 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1;
pk a b c
1 2 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
update t1 set a=3 where pk=1;
select * from t1;
pk a b c
1 3 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
pk a b c
2 7 8 Second row
4 5 6 Fourth row
1 3 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1;
pk a b c
2 7 8 Second row
4 5 6 Fourth row
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
select * from t1 where b=3;
pk a b c
1 3 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
select * from t1 where b=3;
pk a b c
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
delete from t1 where c='Fourth row';
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1 where b=3;
pk a b c
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
use test;
select * from t1;
pk a b c
2 7 8 Second row
1 3 3 First row
select * from t1 where b=3;
pk a b c
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 4
update t1 set a=4 where b=3;
use test;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
pk a b c
2 7 8 Second row
1 4 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 5
select * from t1;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
pk a b c
2 7 8 Second row
1 4 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
begin;
update t1 set a=5 where pk=1;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
pk a b c
2 7 8 Second row
1 4 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 8
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
commit;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 8
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
pk a b c
2 7 8 Second row
1 5 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 9
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
pk a b c
2 7 8 Second row
1 5 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 9
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 8
drop table t1;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
SET GLOBAL query_cache_size=0;
SET GLOBAL ndb_cache_check_time=0;

74
mysql-test/r/ndb_cache_multi2.result Normal file
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drop table if exists t1, t2;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=1;
reset query cache;
flush status;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=1;
reset query cache;
flush status;
create table t1 (a int) engine=ndbcluster;
create table t2 (a int) engine=ndbcluster;
insert into t1 value (2);
insert into t2 value (3);
select * from t1;
a
2
select * from t2;
a
3
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1;
a
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
update t1 set a=3 where a=2;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1;
a
3
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
drop table t1, t2;

126
mysql-test/t/ndb_cache2.test Normal file
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-- source include/have_query_cache.inc
-- source include/have_ndb.inc
--disable_warnings
drop table if exists t1;
--enable_warnings
# Turn on and reset query cache
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
# Turn on thread that will fetch commit count for open tables
set GLOBAL ndb_cache_check_time=5;
reset query cache;
flush status;
# Wait for thread to wake up and start "working"
sleep 20;
# Create test table in NDB
CREATE TABLE t1 ( pk int not null primary key,
a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
insert into t1 value (1, 2, 3, 'First row');
# Perform one query which should be inerted in query cache
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Perform the same query and make sure the query cache is hit
select * from t1;
show status like "Qcache_hits";
# Update the table and make sure the correct data is returned
update t1 set a=3 where pk=1;
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Insert a new record and make sure the correct data is returned
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1;
show status like "Qcache_hits";
# Perform a "new" query and make sure the query cache is not hit
select * from t1 where b=3;
show status like "Qcache_queries_in_cache";
show status like "Qcache_hits";
# Same query again...
select * from t1 where b=3;
show status like "Qcache_hits";
# Delete from the table
delete from t1 where c='Fourth row';
show status like "Qcache_queries_in_cache";
select * from t1 where b=3;
show status like "Qcache_hits";
# Start another connection and check that the query cache is hit
connect (con1,localhost,root,,);
connection con1;
use test;
select * from t1;
select * from t1 where b=3;
show status like "Qcache_hits";
# Update the table and switch to other connection
update t1 set a=4 where b=3;
connect (con2,localhost,root,,);
connection con2;
use test;
show status like "Qcache_queries_in_cache";
select * from t1;
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Use transactions and make sure the query cache is not updated until
# transaction is commited
begin;
update t1 set a=5 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
commit;
# Sleep to let the query cache thread update commit count
sleep 10;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1;
show status like "Qcache_queries_in_cache";
SET GLOBAL query_cache_size=0;
SET GLOBAL ndb_cache_check_time=0;

71
mysql-test/t/ndb_cache_multi2.test Normal file
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-- source include/have_query_cache.inc
-- source include/have_ndb.inc
-- source include/have_multi_ndb.inc
--disable_warnings
drop table if exists t1, t2;
--enable_warnings
# Turn on and reset query cache on server1
connection server1;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=1;
reset query cache;
flush status;
# Turn on and reset query cache on server2
connection server2;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=1;
reset query cache;
flush status;
# Sleep so that the query cache check thread has time to start
sleep 15;
# Create test tables in NDB and load them into cache
# on server1
connection server1;
create table t1 (a int) engine=ndbcluster;
create table t2 (a int) engine=ndbcluster;
insert into t1 value (2);
insert into t2 value (3);
select * from t1;
select * from t2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Connect server2, load table in to cache, then update the table
connection server2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
update t1 set a=3 where a=2;
# Sleep so that the query cache check thread has time to run
sleep 5;
# Connect to server1 and check that cache is invalidated
# and correct data is returned
connection server1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1, t2;