Skip to main content

mariadb optimization - mysqltuner

Anthony Parsons
I just ran mysqltuner on my server, using mariadb 10.1, and it gave me the following, which I don't totally understand as to what I should adjust / add.
>> MySQLTuner 1.6.18 - Major Hayden >> Bug reports, feature requests, and downloads at MySQLTuner-perl by major >> Run with '--help' for additional options and output filtering [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 10.1.17-MariaDB [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ----------------------------------------------------------------- [--] Status: +Aria +CSV +InnoDB +MEMORY +MRG_MyISAM +MyISAM +PERFORMANCE_SCHEMA +SEQUENCE [--] Data in MyISAM tables: 536M (Tables: 840) [--] Data in InnoDB tables: 3G (Tables: 418) [--] Data in MEMORY tables: 1M (Tables: 11) [OK] Total fragmented tables: 0 -------- Security Recommendations ------------------------------------------------------------------ [OK] There are no anonymous accounts for any database users [OK] All database users have passwords assigned [!!] There is no basic password file list! -------- CVE Security Recommendations -------------------------------------------------------------- [--] Skipped due to --cvefile option undefined -------- Performance Metrics ----------------------------------------------------------------------- [--] Up for: 4h 53m 14s (1M q [108.469 qps], 95K conn, TX: 11G, RX: 946M) [--] Reads / Writes: 74% / 26% [--] Binary logging is disabled [--] Physical Memory : 11.7G [--] Max MySQL memory : 1.1G [--] Other process memory: 526.4M [--] Total buffers: 434.0M global + 2.9M per thread (250 max threads) [--] P_S Max memory usage: 0B [--] Galera GCache Max memory usage: 0B [OK] Maximum reached memory usage: 521.2M (4.34% of installed RAM) [OK] Maximum possible memory usage: 1.1G (9.66% of installed RAM) [OK] Overall possible memory usage with other process is compatible with memory available [OK] Slow queries: 0% (1/1M) [OK] Highest usage of available connections: 12% (30/250) [OK] Aborted connections: 0.00% (0/95886) [!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance [OK] Query cache efficiency: 37.4% (579K cached / 1M selects) [!!] Query cache prunes per day: 314770 [OK] Sorts requiring temporary tables: 0% (1 temp sorts / 37K sorts) [OK] No joins without indexes [OK] Temporary tables created on disk: 22% (4K on disk / 20K total) [OK] Thread cache hit rate: 83% (15K created / 95K connections) [!!] Table cache hit rate: 3% (256 open / 6K opened) [OK] Open file limit used: 1% (159/10K) [OK] Table locks acquired immediately: 99% (983K immediate / 983K locks) -------- Performance schema ------------------------------------------------------------------------ [--] Performance schema is disabled. -------- ThreadPool Metrics ------------------------------------------------------------------------ [--] ThreadPool stat is enabled. [--] Thread Pool Size: 6 thread(s). [--] Using default value is good enough for your version (10.1.17-MariaDB) -------- MyISAM Metrics ---------------------------------------------------------------------------- [!!] Key buffer used: 19.9% (26M used / 134M cache) [OK] Key buffer size / total MyISAM indexes: 128.0M/71.9M [OK] Read Key buffer hit rate: 98.6% (1M cached / 19K reads) [!!] Write Key buffer hit rate: 48.0% (176K cached / 91K writes) -------- AriaDB Metrics ---------------------------------------------------------------------------- [--] AriaDB is enabled. [OK] Aria pagecache size / total Aria indexes: 128.0M/1B [OK] Aria pagecache hit rate: 99.2% (546K cached / 4K reads) -------- InnoDB Metrics ---------------------------------------------------------------------------- [--] InnoDB is enabled. [!!] InnoDB buffer pool / data size: 128.0M/3.6G [!!] InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1). [--] InnoDB Buffer Pool Chunk Size not used or defined in your version [OK] InnoDB Read buffer efficiency: 99.06% (103447548 hits/ 104430221 total) [!!] InnoDB Write Log efficiency: 84.23% (1081725 hits/ 1284181 total) [OK] InnoDB log waits: 0.00% (0 waits / 202456 writes) -------- TokuDB Metrics ---------------------------------------------------------------------------- [--] TokuDB is disabled. -------- Galera Metrics ---------------------------------------------------------------------------- [--] Galera is disabled. -------- Replication Metrics ----------------------------------------------------------------------- [--] Galera Synchronous replication: NO [--] No replication slave(s) for this server. [--] This is a standalone server. -------- Recommendations --------------------------------------------------------------------------- General recommendations: MySQL started within last 24 hours - recommendations may be inaccurate Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1 Increase table_open_cache gradually to avoid file descriptor limits Read this before increasing table_open_cache over 64: http://bit.ly/1mi7c4C Beware that open_files_limit (10000) variable should be greater than table_open_cache ( 256) Variables to adjust: query_cache_size (> 10M) table_open_cache (> 256) innodb_buffer_pool_size (>= 3G) if possible. innodb_buffer_pool_instances (=1) [root@whm ~]# ----------------------------------------------------------------------------------------------------
My my.cnf looks like:
GNU nano 2.3.1 File: /etc/my.cnf [mysqld] bind-address=127.0.0.1 performance-schema=0 skip-networking slow-query-log local-infile = 0 max_connections=250 table_open_cache=256 max_delayed_threads=20 max_tmp_tables=32 query_cache_type=1 query_cache_size=10M thread_cache_size=4 innodb_file_per_table=1 innodb_use_native_aio=0 default-storage-engine=MyISAM max_allowed_packet=419430400 open_files_limit=10000 innodb_buffer_pool_size=134217728

Comments

6 comments

Date Votes
  • cPanelMichael
    Hello, [--] Up for: 4h 53m 14s (1M q [108.469 qps], 95K conn, TX: 11G, RX: 946M)
    I recommend letting MariaDB run for at least 24 hours before running the tuner to ensure the results are accurate before making changes to your /etc/my.cnf file. Thank you.
    0
  • Anthony Parsons
    Thanks @cPanelMichael, yer I had to restart it as I increased the query_cache_size from 4M to 10M to fix a whole lot of slow queries that were happening. I basically had hundreds of queries happening with little in cache, which was causing users a whole bunch of problems in live chat and submitting posts in the forum.
    0
  • Anthony Parsons
    Ok, updated test... what does it all mean in relation to what I should be adjusting in my.cnf?
    >> MySQLTuner 1.6.18 - Major Hayden >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 10.1.17-MariaDB [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ----------------------------------------------------------------- [--] Status: +Aria +CSV +InnoDB +MEMORY +MRG_MyISAM +MyISAM +PERFORMANCE_SCHEMA +SEQUENCE [--] Data in MyISAM tables: 536M (Tables: 840) [--] Data in InnoDB tables: 3G (Tables: 418) [--] Data in MEMORY tables: 2M (Tables: 11) [OK] Total fragmented tables: 0 -------- Security Recommendations ------------------------------------------------------------------ [OK] There are no anonymous accounts for any database users [OK] All database users have passwords assigned [!!] There is no basic password file list! -------- CVE Security Recommendations -------------------------------------------------------------- [--] Skipped due to --cvefile option undefined -------- Performance Metrics ----------------------------------------------------------------------- [--] Up for: 1d 1h 50m 26s (10M q [115.518 qps], 525K conn, TX: 59G, RX: 5G) [--] Reads / Writes: 73% / 27% [--] Binary logging is disabled [--] Physical Memory : 11.7G [--] Max MySQL memory : 1.1G [--] Other process memory: 612.0M [--] Total buffers: 434.0M global + 2.9M per thread (250 max threads) [--] P_S Max memory usage: 0B [--] Galera GCache Max memory usage: 0B [OK] Maximum reached memory usage: 623.0M (5.19% of installed RAM) [OK] Maximum possible memory usage: 1.1G (9.66% of installed RAM) [OK] Overall possible memory usage with other process is compatible with memory available [OK] Slow queries: 0% (9/10M) [OK] Highest usage of available connections: 26% (65/250) [OK] Aborted connections: 0.00% (0/525485) [!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance [OK] Query cache efficiency: 36.9% (3M cached / 8M selects) [!!] Query cache prunes per day: 356455 [OK] Sorts requiring temporary tables: 0% (17 temp sorts / 205K sorts) [OK] No joins without indexes [OK] Temporary tables created on disk: 24% (29K on disk / 117K total) [OK] Thread cache hit rate: 82% (92K created / 525K connections) [!!] Table cache hit rate: 0% (256 open / 48K opened) [OK] Open file limit used: 1% (188/10K) [OK] Table locks acquired immediately: 99% (5M immediate / 5M locks) -------- Performance schema ------------------------------------------------------------------------ [--] Performance schema is disabled. -------- ThreadPool Metrics ------------------------------------------------------------------------ [--] ThreadPool stat is enabled. [--] Thread Pool Size: 6 thread(s). [--] Using default value is good enough for your version (10.1.17-MariaDB) -------- MyISAM Metrics ---------------------------------------------------------------------------- [!!] Key buffer used: 20.4% (27M used / 134M cache) [OK] Key buffer size / total MyISAM indexes: 128.0M/72.2M [OK] Read Key buffer hit rate: 98.4% (7M cached / 119K reads) [!!] Write Key buffer hit rate: 48.5% (953K cached / 491K writes) -------- AriaDB Metrics ---------------------------------------------------------------------------- [--] AriaDB is enabled. [OK] Aria pagecache size / total Aria indexes: 128.0M/1B [OK] Aria pagecache hit rate: 96.5% (1M cached / 58K reads) -------- InnoDB Metrics ---------------------------------------------------------------------------- [--] InnoDB is enabled. [!!] InnoDB buffer pool / data size: 128.0M/3.6G [!!] InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1). [--] InnoDB Buffer Pool Chunk Size not used or defined in your version [OK] InnoDB Read buffer efficiency: 99.43% (810119305 hits/ 814776441 total) [!!] InnoDB Write Log efficiency: 84.87% (5969612 hits/ 7034158 total) [OK] InnoDB log waits: 0.00% (0 waits / 1064546 writes) -------- TokuDB Metrics ---------------------------------------------------------------------------- [--] TokuDB is disabled. -------- Galera Metrics ---------------------------------------------------------------------------- [--] Galera is disabled. -------- Replication Metrics ----------------------------------------------------------------------- [--] Galera Synchronous replication: NO [--] No replication slave(s) for this server. [--] This is a standalone server. -------- Recommendations --------------------------------------------------------------------------- General recommendations: Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1 Increase table_open_cache gradually to avoid file descriptor limits Read this before increasing table_open_cache over 64: http://bit.ly/1mi7c4C Beware that open_files_limit (10000) variable should be greater than table_open_cache ( 256) Variables to adjust: query_cache_size (> 10M) table_open_cache (> 256) innodb_buffer_pool_size (>= 3G) if possible. innodb_buffer_pool_instances (=1)
    My current my.cnf:
    GNU nano 2.3.1 File: /etc/my.cnf [mysqld] bind-address=127.0.0.1 performance-schema=0 skip-networking slow-query-log local-infile = 0 max_connections=250 table_open_cache=256 max_delayed_threads=20 max_tmp_tables=32 query_cache_type=1 query_cache_size=10M thread_cache_size=4 innodb_file_per_table=1 innodb_use_native_aio=0 default-storage-engine=MyISAM max_allowed_packet=419430400 open_files_limit=10000 innodb_buffer_pool_size=134217728
    0
  • Anthony Parsons
    I have only made two existing changes to my.cnf, one was the max_connections, as I was getting connection errors logged in XF ACP, so I upped it from 200 to 250, however, what I believe the issue really was, was the next change I made, query cache size, from default 4M to 10M, which then radically dropped the connections and increased the caching of queries, thus subsequently fixed a whole bunch of issues users were getting with slow queries and taking up-to 30 seconds for something to happen.
    0
  • cPanelMichael
    what I believe the issue really was, was the next change I made, query cache size, from default 4M to 10M, which then radically dropped the connections and increased the caching of queries, thus subsequently fixed a whole bunch of issues users were getting with slow queries and taking up-to 30 seconds for something to happen.

    I'm happy to see you were able to make a change that addressed some issues. Thank you for updating us with the outcome.
    0
  • WebHostPro
    We upgraded to MariaDB recently and was wondering if the tweaks you made helps MySQL run better on a high loaded shared server. If so, can you please post your end result for the my.cnf file. Thanks!
    0

Please sign in to leave a comment.

Didn't find what you were looking for?

New post