Originally Posted by Basil
The items that show is red are specifically:

Slow_queries 537 - The number of queries that have taken more than long_query_time seconds.

Handler_read_rnd 2,582 k - The number of requests to read a row based on a fixed position.

Handler_read_rnd_next 338 M - The number of requests to read the next row in the data file. This is high if you are doing a lot of table scans. Generally this suggests that your tables are not properly indexed or that your queries are not written to take advantage of the indexes you have.

Qcache_lowmem_prunes 18 k The number of queries that have been removed from the cache to free up memory for caching new queries. This information can help you tune the query cache size. The query cache uses a least recently used (LRU) strategy to decide which queries to remove from the cache.

Created_tmp_disk_tables 117 The number of temporary tables on disk created automatically by the server while executing statements. If Created_tmp_disk_tables is big, you may want to increase the tmp_table_size value to cause temporary tables to be memory-based instead of disk-based.

Select_full_join 8,248 The number of joins that do not use indexes. If this value is not 0, you should carefully check the indexes of your tables.

Sort_merge_passes 23 The number of merge passes the sort algorithm has had to do. If this value is large, you should consider increasing the value of the sort_buffer_size system variable.

Opened_tables 3,166 The number of tables that have been opened. If opened tables is big, your table cache value is probably too small.

Table_locks_waited 14 k The number of times that a table lock could not be acquired immediately and a wait was needed. If this is high, and you have performance problems, you should first optimize your queries, and then either split your table or tables or use replication.

Out of curiosity I ran the same thing to compare...

Slow_queries 642
Handler_read_rnd 30 M
Handler_read_rnd_next 913 M
Qcache_lowmem_prunes 141 k
Slow_launch_threads 4 - The number of threads that have taken more than slow_launch_time seconds to create
Created_tmp_disk_tables 13 k
Select_full_join 1,418
Select_range_check 4 - The number of joins without keys that check for key usage after each row. (If this is not 0, you should carefully check the indexes of your tables.)
Opened_tables 23 k
Table_locks_waited 3,349

I only have one active database, on a shared server. Dumb question, but is this server-wide, or just me? Some of them seem out of control!


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