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38e395aa32
- 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. sql/ha_ndbcluster.cc: Added a thread that periodically will fetch commit_count for open tables and store that value in share. The commit count value is then used when query cache asks if a cached query can be used. The thread activation interval is regulated by the config variable ndb_cache_check_time, it's default value is 0 which means that NDB is contacted every time a cached query is reused. sql/ha_ndbcluster.h: Added commit_count to share Added ndb_cache_check_time sql/mysqld.cc: Added config variable ndb_cache_check_time sql/set_var.cc: Added config variable ndb_cache_check_time
71 lines
1.8 KiB
Text
71 lines
1.8 KiB
Text
-- source include/have_query_cache.inc
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-- source include/have_ndb.inc
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-- source include/have_multi_ndb.inc
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--disable_warnings
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drop table if exists t1, t2;
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--enable_warnings
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# Turn on and reset query cache on server1
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connection server1;
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set GLOBAL query_cache_type=on;
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set GLOBAL query_cache_size=1355776;
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set GLOBAL ndb_cache_check_time=1;
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reset query cache;
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flush status;
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# Turn on and reset query cache on server2
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connection server2;
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set GLOBAL query_cache_type=on;
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set GLOBAL query_cache_size=1355776;
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set GLOBAL ndb_cache_check_time=1;
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reset query cache;
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flush status;
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# Sleep so that the query cache check thread has time to start
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sleep 15;
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# Create test tables in NDB and load them into cache
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# on server1
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connection server1;
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create table t1 (a int) engine=ndbcluster;
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create table t2 (a int) engine=ndbcluster;
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insert into t1 value (2);
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insert into t2 value (3);
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select * from t1;
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select * from t2;
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_inserts";
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show status like "Qcache_hits";
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# Connect server2, load table in to cache, then update the table
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connection server2;
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_inserts";
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show status like "Qcache_hits";
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select * from t1;
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_inserts";
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show status like "Qcache_hits";
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update t1 set a=3 where a=2;
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# Sleep so that the query cache check thread has time to run
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sleep 5;
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# Connect to server1 and check that cache is invalidated
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# and correct data is returned
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connection server1;
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_inserts";
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show status like "Qcache_hits";
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select * from t1;
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_inserts";
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show status like "Qcache_hits";
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drop table t1, t2;
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