Hi,

I am using workbench to know the status of the server and the query cache hit rate is 0.20 and key efficiency is 100% and the status variables are

mysql> SHOW GLOBAL STATUS LIKE 'Qcache%';
+-------------------------+-----------+
| Variable_name | Value |
+-------------------------+-----------+
| Qcache_free_blocks | 54 |
| Qcache_free_memory | 26309232 |
| Qcache_hits | 934615 |
| Qcache_inserts | 454680839 |
| Qcache_lowmem_prunes | 230756 |
| Qcache_not_cached | 1700867 |
| Qcache_queries_in_cache | 6167 |
| Qcache_total_blocks | 12443 |
+-------------------------+-----------+
8 rows in set (0.00 sec)

please help me in improving query cache hit rate????

You are missing query_cache_limit. This parameter defines the maximum result set size stored in the query cache. If your Qcache_hits to Qcache_inserts is low (which it appears to be here) this can suggest that your query_cache_limit is too low and should be increased. All other parameters look good.

thanks Ronan,
query_cache_limit variable is set to 1MB in my.cnf.Can it be increased to 2MB???

Change it and see the results. If it still results in poor usage of query cache then increase it again.