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my.cnf Optimization Help Please

MrMagoo
Please assist with recommendations for my.cnf - dedicated server performance very slow. Thanks in advance. free -m total used free shared buffers cached Mem: 7500 1757 5742 0 0 0 -/+ buffers/cache: 1757 5742 Swap: 0 0 0
[mysqld] #skip-grant-tables local-infile=0 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock skip-locking skip-innodb query_cache_limit=64M query_cache_size=128M query_cache_type=1 max_user_connections=500 max_connections=1000 interactive_timeout=10 wait_timeout=10 connect_timeout=10 thread_cache_size=128 key_buffer_size=256M join_buffer_size=512M max_heap_table_size=256M tmp_table_size=256M max_allowed_packet=16M table_cache=2048 record_buffer=1M sort_buffer_size=4M read_buffer_size=4M max_connect_errors=10 thread_concurrency=8 myisam_sort_buffer_size=64M server-id=1 bind-address=125.214.73.213 #[mysql.server] #user=mysql #basedir=/var/lib open_files_limit=7972 [safe_mysqld] err-log=/var/log/mysqld.log pid-file=/var/lib/mysql/mysql.pid #[mysqldump] #quick max_allowed_packet=16M [mysql] no-auto-rehash [isamchk] key_buffer=256M sort_buffer=256M read_buffer=16M write_buffer=16M [myisamchk] key_buffer=256M sort_buffer=256M read_buffer=16M write_buffer=16M [mysqlhotcopy] interactive-timeout log-slow-queries=/var/lib/mysql/slow.log
>> MySQLTuner 1.0.1 - Major Hayden >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.0.96-community [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated -InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 3G (Tables: 1299) [!!] Total fragmented tables: 26 -------- Performance Metrics ------------------------------------------------- [--] Up for: 20m 13s (84K q [69.830 qps], 8K conn, TX: 165M, RX: 13M) [--] Reads / Writes: 72% / 28% [--] Total buffers: 650.0M global + 520.5M per thread (1000 max threads) [!!] Maximum possible memory usage: 508.9G (6948% of installed RAM) [OK] Slow queries: 0% (0/84K) [OK] Highest usage of available connections: 6% (60/1000) [OK] Key buffer size / total MyISAM indexes: 256.0M/1.4G [OK] Key buffer hit rate: 99.9% (9M cached / 5K reads) [OK] Query cache efficiency: 75.2% (38K cached / 51K selects) [OK] Query cache prunes per day: 0 [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 5K sorts) [!!] Joins performed without indexes: 1137 [!!] Temporary tables created on disk: 42% (1K on disk / 3K total) [OK] Thread cache hit rate: 99% (60 created / 8K connections) [OK] Table cache hit rate: 99% (1K open / 1K opened) [OK] Open file limit used: 34% (2K/7K) [!!] Table locks acquired immediately: 94% -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Reduce your overall MySQL memory footprint for system stability Enable the slow query log to troubleshoot bad queries Adjust your join queries to always utilize indexes Temporary table size is already large - reduce result set size Reduce your SELECT DISTINCT queries without LIMIT clauses Optimize queries and/or use InnoDB to reduce lock wait Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** join_buffer_size (> 512.0M, or always use indexes with joins)

Comments

2 comments

Date Votes
  • cPanelMichael
    Hello :) MySQL was only running for 20 minutes when you ran the MySQL tuner script: [QUOTE]Up for: 20m 13s (84K q [69.830 qps], 8K conn, TX: 165M, RX: 13M)
    Please let it run for at least 24 hours before running the MySQL tuner script to ensure accurate results. Thank you.
    0
  • thinkbot
    Ohh, some of your settings are horrible, without any understanding (like join_buffer_size) Please adjust those: query_cache_limit=2M query_cache_size=50M max_user_connections=100 max_connections=300 key_buffer_size=2000M join_buffer_size=2M sort_buffer_size=256K read_buffer_size=128K and add slow query tracking (becouse of a lot queries creating temp files on disk) slow_query_log=1 slow_query_log_file=mysql-slow.log long_query_time=0.1 log-queries-not-using-indexes then restart, after a while please run mysqltuner again, and show us here the result plus, on slow log, run pt-query-digest cd /root; wget
    0

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