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Prosiłbym o porady dotyczące optymalnego ustawienia my.cnf
Serwer:
2GB pamięci
2x2,8GHz procesor
Bazy danych:
1. ok. 300MB - baza forum vBulletin
2. ok. 150MB - baza forum vBulletin
3. ok. 100MB - baza CMS DataLife Engine
4. ok. 10MB - baza OSCommerce
5. ok. 6MB - baza OSCommerce
Pamięć wolna to ponad 1GB tak więc gdzie mógłbym zwiększyć wartość?
[mysqld] bind-address=127.0.0.1 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock query_cache_limit=1M query_cache_size=32M query_cache_type=1 max_connections=3000 max_user_connections=600 interactive_timeout=100 wait_timeout=100 connect_timeout=10 thread_cache_size=128 key_buffer=128M join_buffer_size=2M max_allowed_packet=32M table_cache=1024 sort_buffer_size=2M read_buffer_size=2M read_rnd_buffer_size=1536K max_connect_errors=10 thread_concurrency=4 myisam_sort_buffer_size=64M skip-locking server-id=1 [mysql.server] user=mysql basedir=/var/lib [safe_mysqld] bind-address=127.0.0.1 err-log=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid open_files_limit=8192 SAFE_MYSQLD_OPTIONS=”–defaults-file=/etc/my.cnf –log-slow-queries=/var/log/slow-queries.log” #[mysqldump] #quick #max_allowed_packet=16M [mysql] no-auto-rehash [isamchk] key_buffer=128M sort_buffer=128M read_buffer=32M write_buffer=32M [myisamchk] key_buffer=128M sort_buffer=128M read_buffer=32M write_buffer=32M [mysqlhotcopy] interactive-timeout
Wynik z Tuning Primer
-- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.0.45 i686 Uptime = 0 days 0 hrs 13 min 12 sec Avg. qps = 112 Total Questions = 88735 Threads Connected = 6 Warning: Server has not been running for at least 48hrs. It may not be safe to use 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 88775 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 = 128 Current threads_cached = 8 Current threads_per_sec = 0 Historic threads_per_sec = 0 Your thread_cache_size is fine MAX CONNECTIONS Current max_connections = 3000 Current threads_connected = 6 Historic max_used_connections = 11 The number of used connections is 0% of the configured maximum. You are using less than 10% of your configured max_connections. Lowering max_connections could help to avoid an over-allocation of memory See "MEMORY USAGE" section to make sure you are not over-allocating INNODB STATUS Current InnoDB index space = 2 M Current InnoDB data space = 2 M Current InnoDB buffer pool free = 29 % 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 : 254 M Configured Max Per-thread Buffers : 22.48 G Configured Max Global Buffers : 170 M Configured Max Memory Limit : 22.65 G Physical Memory : 1.95 G nMax memory limit exceeds 90% of physical memory KEY BUFFER Current MyISAM index space = 235 M Current key_buffer_size = 128 M Key cache miss rate is 1 : 1040 Key buffer free ratio = 81 % Your key_buffer_size seems to be fine QUERY CACHE Query cache is enabled Current query_cache_size = 32 M Current query_cache_used = 9 M Current query_cache_limit = 1 M Current Query cache Memory fill ratio = 29.44 % Current query_cache_min_res_unit = 4 K MySQL won't cache query results that are larger than query_cache_limit in size SORT OPERATIONS Current sort_buffer_size = 2 M Current read_rnd_buffer_size = 1 M Sort buffer seems to be fine JOINS Current join_buffer_size = 2.00 M 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 = 15000 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 = 1024 tables You have a total of 1508 tables You have 1024 open tables. Current table_cache hit rate is 21% , 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 1382 temp tables, 1% 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 = 1 M Current table scan ratio = 4134 : 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 : 603 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'.
