醉清风的叶子

　　– MYSQL PERFORMANCE TUNING PRIMER –
- By: Matthew Montgomery -

MySQL Version 5.0.45 i686
　　
Uptime = 19 days 8 hrs 32 min 54 sec
Avg. qps = 0
Total Questions = 264260
Threads Connected = 1

　　
Server has been running for over 48hrs.
It should be safe to follow these recommendations

　　
To find out more information on how each of these
runtime variables effects performance visit:
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html
Visit http://www.mysql.com/products/enterprise/advisors.html
for info about MySQL’s Enterprise Monitoring and Advisory Service

　　
SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 10 sec.
You have 0 out of 264274 that take longer than 10 sec. to complete
Your long_query_time may be too high, I typically set this under 5 sec.

　　
BINARY UPDATE LOG
The binary update log is NOT enabled.
You will not be able to do point in time recovery
See http://dev.mysql.com/doc/refman/5.0/en/point-in-time-recovery.html

　　
WORKER THREADS
Current thread_cache_size = 0
Current threads_cached = 0
Current threads_per_sec = 1
Historic threads_per_sec = 0
Your thread_cache_size is fine

　　
MAX CONNECTIONS
Current max_connections = 100
Current threads_connected = 1
Historic max_used_connections = 33
The number of used connections is 33% of the configured maximum.
Your max_connections variable seems to be fine.

　　
MEMORY USAGE
Max Memory Ever Allocated : 96 M
Configured Max Per-thread Buffers : 268 M
Configured Max Global Buffers : 7 M
Configured Max Memory Limit : 276 M
Physical Memory : 1.97 G
Max memory limit seem to be within acceptable norms

　　
KEY BUFFER
Current MyISAM index space = 8 M
Current key_buffer_size = 7 M
Key cache miss rate is 1 : 1817
Key buffer fill ratio = 6.00 %
Your key_buffer_size seems to be too high.
Perhaps you can use these resources elsewhere

　　
QUERY CACHE
Query cache is supported but not enabled
Perhaps you should set the query_cache_size

　　
SORT OPERATIONS
Current sort_buffer_size = 2 M
Current read_rnd_buffer_size = 256 K
Sort buffer seems to be fine

　　
JOINS
Current join_buffer_size = 132.00 K
You have had 0 queries where a join could not use an index properly
Your joins seem to be using indexes properly

　　
OPEN FILES LIMIT
Current open_files_limit = 1024 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine

　　
TABLE CACHE
Current table_cache value = 64 tables
You have a total of 125 tables
You have 64 open tables.
Current table_cache hit rate is 9%, while 100% of your table cache is in use
You should probably increase your table_cache

TEMP TABLES
Current max_heap_table_size = 16 M
Current tmp_table_size = 32 M
Of 564 temp tables, 6% were created on disk
Effective in-memory tmp_table_size is limited to max_heap_table_size.
Created disk tmp tables ratio seems fine

　　
TABLE SCANS
Current read_buffer_size = 128 K
Current table scan ratio = 1 : 1
read_buffer_size seems to be fine

　　
TABLE LOCKING
Current Lock Wait ratio = 0 : 264392
Your table locking seems to be fine

软件截图