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كود PHP:
-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -
MySQL Version 5.0.92-community-log x86_64
Uptime = 2 days 9 hrs 13 min 58 sec
Avg. qps = 78
Total Questions = 16218384
Threads Connected = 14
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 enabled.
Current long_query_time = 10 sec.
You have 41175 out of 16218532 that take longer than 10 sec. to complete
Your long_query_time seems to be fine
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 = 4
Current threads_cached = 2
Current threads_per_sec = 3
Historic threads_per_sec = 3
Threads created per/sec are overrunning threads cached
You should raise thread_cache_size
MAX CONNECTIONS
Current max_connections = 400
Current threads_connected = 16
Historic max_used_connections = 227
The number of used connections is 56% of the configured maximum.
Your max_connections variable seems to be fine.
INNODB STATUS
Current InnoDB index space = 208 K
Current InnoDB data space = 144 K
Current InnoDB buffer pool free = 90 %
Current innodb_buffer_pool_size = 8 M
Depending on how much space your innodb indexes take up it may be safe
to increase this value to up to 2 / 3 of total system memory
MEMORY USAGE
Max Memory Ever Allocated : 9.89 G
Configured Max Per-thread Buffers : 15.77 G
Configured Max Global Buffers : 970 M
Configured Max Memory Limit : 16.71 G
Physical Memory : 23.52 G
Max memory limit seem to be within acceptable norms
KEY BUFFER
Current MyISAM index space = 748 M
Current key_buffer_size = 768 M
Key cache miss rate is 1 : 5166
Key buffer free ratio = 68 %
Your key_buffer_size seems to be fine
QUERY CACHE
Query cache is enabled
Current query_cache_size = 192 M
Current query_cache_used = 17 M
Current query_cache_limit = 64 M
Current Query cache Memory fill ratio = 9.23 %
Current query_cache_min_res_unit = 4 K
Your query_cache_size seems to be too high.
Perhaps you can use these resources elsewhere
MySQL won't cache query results that are larger than query_cache_limit in size
SORT OPERATIONS
Current sort_buffer_size = 16 M
Current read_rnd_buffer_size = 8 M
Sort buffer seems to be fine
JOINS
Current join_buffer_size = 16.00 M
You have had 9 queries where a join could not use an index properly
join_buffer_size >= 4 M
This is not advised
You should enable "log-queries-not-using-indexes"
Then look for non indexed joins in the slow query log.
OPEN FILES LIMIT
Current open_files_limit = 12288 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 = 4096 tables
You have a total of 862 tables
You have 1490 open tables.
The table_cache value seems to be fine
TEMP TABLES
Current max_heap_table_size = 256 M
Current tmp_table_size = 256 M
Of 1691235 temp tables, 8% were created on disk
Created disk tmp tables ratio seems fine
TABLE SCANS
Current read_buffer_size = 128 K
Current table scan ratio = 24397 : 1
You have a high ratio of sequential access requests to SELECTs
You may benefit from raising read_buffer_size and/or improving your use of indexes.
TABLE LOCKING
Current Lock Wait ratio = 1 : 12
You may benefit from selective use of InnoDB.
If you have long running SELECT's against MyISAM tables and perform
frequent updates consider setting 'low_priority_updates=1'
If you have a high concurrency of inserts on Dynamic row-length tables
consider setting 'concurrent_insert=2'.
وهذا الملف
كود PHP:
[mysqld]
local-infile=0
max_connections=400
max_user_connections=150
query_cache_type=1
query_cache_limit=64M
query_cache_size=192M
interactive_timeout=60
wait_timeout=60
connect_timeout=10
table_cache=4096
open_files_limit=12288
join_buffer_size=16M
key_buffer=768M
sort_buffer_size=16M
read_rnd_buffer_size=8M
thread_concurrency=2
thread_cache=16
thread_cache_size=4
tmp_table_size=256M
max_heap_table_size=256M
log-slow-queries =/var/lib/mysql/slow
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