new status variable (number of queries deleted because of low memory)
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@ -320,6 +320,9 @@ insert into t1 select * from t2;
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show status like "Qcache_hits";
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show status like "Qcache_hits";
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Variable_name Value
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Variable_name Value
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Qcache_hits 4
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Qcache_hits 4
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show status like "Qcache_lowmem_prunes";
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Variable_name Value
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Qcache_lowmem_prunes 0
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select a as a1, a as a2 from t1;
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select a as a1, a as a2 from t1;
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select a as a2, a as a3 from t1;
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select a as a2, a as a3 from t1;
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select a as a3, a as a4 from t1;
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select a as a3, a as a4 from t1;
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@ -330,6 +333,9 @@ Qcache_hits 4
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Variable_name Value
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Qcache_queries_in_cache 2
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Qcache_queries_in_cache 2
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show status like "Qcache_lowmem_prunes";
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Variable_name Value
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Qcache_lowmem_prunes 2
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reset query cache;
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reset query cache;
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insert into t2 select * from t1;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t1 select * from t2;
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@ -206,6 +206,7 @@ insert into t2 select * from t1; # 2584
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insert into t1 select * from t2; # 4181
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insert into t1 select * from t2; # 4181
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show status like "Qcache_hits";
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show status like "Qcache_hits";
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show status like "Qcache_lowmem_prunes";
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disable_result_log;
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disable_result_log;
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select a as a1, a as a2 from t1;
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select a as a1, a as a2 from t1;
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select a as a2, a as a3 from t1;
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select a as a2, a as a3 from t1;
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@ -215,6 +216,7 @@ select a as a1, a as a2 from t1;
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enable_result_log;
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enable_result_log;
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show status like "Qcache_hits";
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show status like "Qcache_hits";
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_queries_in_cache";
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show status like "Qcache_lowmem_prunes";
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reset query cache;
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reset query cache;
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#
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#
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# Query bigger then query_cache_limit
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# Query bigger then query_cache_limit
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@ -3793,6 +3793,7 @@ struct show_var_st status_vars[]= {
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{"Qcache_queries_in_cache", (char*) &query_cache.queries_in_cache, SHOW_LONG_CONST},
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{"Qcache_queries_in_cache", (char*) &query_cache.queries_in_cache, SHOW_LONG_CONST},
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{"Qcache_inserts", (char*) &query_cache.inserts, SHOW_LONG},
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{"Qcache_inserts", (char*) &query_cache.inserts, SHOW_LONG},
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{"Qcache_hits", (char*) &query_cache.hits, SHOW_LONG},
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{"Qcache_hits", (char*) &query_cache.hits, SHOW_LONG},
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{"Qcache_lowmem_prunes", (char*) &query_cache.lowmem_prunes, SHOW_LONG},
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{"Qcache_not_cached", (char*) &query_cache.refused, SHOW_LONG},
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{"Qcache_not_cached", (char*) &query_cache.refused, SHOW_LONG},
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{"Qcache_free_memory", (char*) &query_cache.free_memory,
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{"Qcache_free_memory", (char*) &query_cache.free_memory,
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SHOW_LONG_CONST},
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SHOW_LONG_CONST},
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@ -708,7 +708,7 @@ Query_cache::Query_cache(ulong query_cache_limit_arg,
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:query_cache_size(0),
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:query_cache_size(0),
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query_cache_limit(query_cache_limit_arg),
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query_cache_limit(query_cache_limit_arg),
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queries_in_cache(0), hits(0), inserts(0), refused(0),
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queries_in_cache(0), hits(0), inserts(0), refused(0),
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total_blocks(0),
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total_blocks(0), lowmem_prunes(0),
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min_allocation_unit(ALIGN_SIZE(min_allocation_unit_arg)),
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min_allocation_unit(ALIGN_SIZE(min_allocation_unit_arg)),
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min_result_data_size(ALIGN_SIZE(min_result_data_size_arg)),
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min_result_data_size(ALIGN_SIZE(min_result_data_size_arg)),
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def_query_hash_size(ALIGN_SIZE(def_query_hash_size_arg)),
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def_query_hash_size(ALIGN_SIZE(def_query_hash_size_arg)),
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@ -1512,6 +1512,7 @@ my_bool Query_cache::free_old_query()
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if (query_block != 0)
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if (query_block != 0)
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{
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{
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free_query(query_block);
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free_query(query_block);
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lowmem_prunes++;
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DBUG_RETURN(0);
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DBUG_RETURN(0);
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}
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}
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}
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}
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@ -219,7 +219,7 @@ public:
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ulong query_cache_size, query_cache_limit;
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ulong query_cache_size, query_cache_limit;
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/* statistics */
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/* statistics */
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ulong free_memory, queries_in_cache, hits, inserts, refused,
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ulong free_memory, queries_in_cache, hits, inserts, refused,
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free_memory_blocks, total_blocks;
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free_memory_blocks, total_blocks, lowmem_prunes;
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protected:
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protected:
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/*
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/*
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