After about a few hours going live, the server would lock up, and would only work again after restarting mysql. I'm guessing I need to optimize mysql now but I don't have much experience in this area, hope someone here could help get me started.
Hopefully the below is enough info to provide some guidance. Thanks!
200-500 users online on average
Quad Core - Intel Xeon E3 1230v3
16 GB DDR3 RAM
250GB HDD x2 Raid 1
-- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.5.37-cll x86_64 Uptime = 0 days 1 hrs 59 min 16 sec Avg. qps = 44 Total Questions = 317764 Threads Connected = 108 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/5.5/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 = 10.000000 sec. You have 533 out of 317785 that take longer than 10.000000 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/5.5/en/point-in-time-recovery.html WORKER THREADS Current thread_cache_size = 50 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 = 500 Current threads_connected = 110 Historic max_used_connections = 131 The number of used connections is 26% of the configured maximum. Your max_connections variable seems to be fine. INNODB STATUS Current InnoDB index space = 224 M Current InnoDB data space = 937 M Current InnoDB buffer pool free = 0 % Current innodb_buffer_pool_size = 128 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 : 1.11 G Configured Max Per-thread Buffers : 1.34 G Configured Max Global Buffers : 656 M Configured Max Memory Limit : 1.98 G Physical Memory : 15.53 G Max memory limit seem to be within acceptable norms KEY BUFFER Current MyISAM index space = 77 M Current key_buffer_size = 512 M Key cache miss rate is 1 : 1918 Key buffer free ratio = 81 % Your key_buffer_size seems to be fine 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 1422 queries where a join could not use an index properly You should enable "log-queries-not-using-indexes" Then look for non indexed joins in the slow query log. If you are unable to optimize your queries you may want to increase your join_buffer_size to accommodate larger joins in one pass. Note! This script will still suggest raising the join_buffer_size when ANY joins not using indexes are found. OPEN FILES LIMIT Current open_files_limit = 2500 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_open_cache = 400 tables Current table_definition_cache = 400 tables You have a total of 788 tables You have 400 open tables. Current table_cache hit rate is 0% , while 100% of your table cache is in use You should probably increase your table_cache You should probably increase your table_definition_cache value. TEMP TABLES Current max_heap_table_size = 16 M Current tmp_table_size = 16 M Of 22815 temp tables, 31% were created on disk Perhaps you should increase your tmp_table_size and/or max_heap_table_size to reduce the number of disk-based temporary tables Note! BLOB and TEXT columns are not allow in memory tables. If you are using these columns raising these values might not impact your ratio of on disk temp tables. TABLE SCANS Current read_buffer_size = 128 K Current table scan ratio = 385 : 1 read_buffer_size seems to be fine TABLE LOCKING Current Lock Wait ratio = 1 : 1130 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=ALWAYS'.
>> MySQLTuner 1.4.4 - Major Hayden <firstname.lastname@example.org> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering [OK] Currently running supported MySQL version 5.5.37-cll [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM [--] Data in MyISAM tables: 174M (Tables: 326) [--] Data in InnoDB tables: 938M (Tables: 413) [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17) [--] Data in MEMORY tables: 621K (Tables: 7) [!!] Total fragmented tables: 95 ERROR 1102 (42000) at line 1: Incorrect database name '#mysql50# WHMSonic v2.1.13 Testing-ECHO http:' -------- Security Recommendations ------------------------------------------- [OK] There is no anonymous account in all database users [OK] All database users have passwords assigned [!!] There is not basic password file list ! -------- Performance Metrics ------------------------------------------------- [--] Up for: 2h 13m 57s (358K q [44.663 qps], 23K conn, TX: 17B, RX: 179M) [--] Reads / Writes: 84% / 16% [--] Total buffers: 672.0M global + 2.8M per thread (500 max threads) [OK] Maximum possible memory usage: 2.0G (12% of installed RAM) [OK] Slow queries: 0% (1K/358K) [OK] Highest usage of available connections: 35% (178/500) [OK] Key buffer size / total MyISAM indexes: 512.0M/77.4M [OK] Key buffer hit rate: 99.9% (76M cached / 43K reads) [!!] Query cache is disabled [OK] Sorts requiring temporary tables: 0% (7 temp sorts / 23K sorts) [!!] Joins performed without indexes: 1457 [!!] Temporary tables created on disk: 46% (10K on disk / 23K total) [OK] Thread cache hit rate: 98% (312 created / 23K connections) [!!] Table cache hit rate: 0% (400 open / 50K opened) [OK] Open file limit used: 5% (132/2K) [OK] Table locks acquired immediately: 99% (530K immediate / 531K locks) -------- InnoDB Metrics ----------------------------------------------------- [--] InnoDB is enabled. [--] InnoDB BufferPool Size :128.0M [--] InnoDB BufferPool Inst :1 [!!] InnoDB buffer pool / data size: 128.0M/938.1M [OK] InnoDB buffer pool instances: 1 [OK] InnoDB log waits: 0 -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Enable the slow query log to troubleshoot bad queries Adjust your join queries to always utilize indexes When making adjustments, make tmp_table_size/max_heap_table_size equal Reduce your SELECT DISTINCT queries without LIMIT clauses Increase table_open_cache gradually to avoid file descriptor limits Read this before increasing table_open_cache over 64: http://bit.ly/1mi7c4C Variables to adjust: query_cache_size (>= 8M) join_buffer_size (> 128.0K, or always use indexes with joins) tmp_table_size (> 16M) max_heap_table_size (> 16M) table_open_cache (> 400) innodb_buffer_pool_size (>= 938M)