>>  MySQLTuner 1.7.19 - Major Hayden <major@mhtx.net>
 >>  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
[!!] Your MySQL version 5.5.65-MariaDB is EOL software!  Upgrade soon!
[OK] Operating on 64-bit architecture

-------- Log file Recommendations ------------------------------------------------------------------
[OK] Log file /var/log/mariadb/mariadb.log exists
[--] Log file: /var/log/mariadb/mariadb.log(71K)
[OK] Log file /var/log/mariadb/mariadb.log is readable.
[OK] Log file /var/log/mariadb/mariadb.log is not empty
[OK] Log file /var/log/mariadb/mariadb.log is smaller than 32 Mb
[!!] /var/log/mariadb/mariadb.log contains 10 warning(s).
[!!] /var/log/mariadb/mariadb.log contains 78 error(s).
[--] 36 start(s) detected in /var/log/mariadb/mariadb.log
[--] 1) 200531 22:21:29 [Note] /usr/libexec/mysqld: ready for connections.
[--] 2) 200531 22:17:36 [Note] /usr/libexec/mysqld: ready for connections.
[--] 3) 200529 19:47:15 [Note] /usr/libexec/mysqld: ready for connections.
[--] 4) 200529 19:24:24 [Note] /usr/libexec/mysqld: ready for connections.
[--] 5) 200529 19:15:13 [Note] /usr/libexec/mysqld: ready for connections.
[--] 6) 200529 17:31:41 [Note] /usr/libexec/mysqld: ready for connections.
[--] 7) 200529 17:31:00 [Note] /usr/libexec/mysqld: ready for connections.
[--] 8) 200529 17:28:19 [Note] /usr/libexec/mysqld: ready for connections.
[--] 9) 200529 17:25:48 [Note] /usr/libexec/mysqld: ready for connections.
[--] 10) 200529 17:24:21 [Note] /usr/libexec/mysqld: ready for connections.
[--] 49 shutdown(s) detected in /var/log/mariadb/mariadb.log
[--] 1) 200531 22:21:23 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 2) 200531 22:21:16 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 3) 200531 22:21:09 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 4) 200531 22:21:02 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 5) 200531 22:20:54 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 6) 200531 22:20:48 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 7) 200531 22:20:41 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 8) 200531 22:20:33 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 9) 200531 22:20:27 [Note] /usr/libexec/mysqld: Shutdown complete
[--] 10) 200531 22:20:26 [Note] /usr/libexec/mysqld: Shutdown complete

-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +Aria +BLACKHOLE +CSV +FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in MyISAM tables: 7.9G (Tables: 222)
[--] Data in InnoDB tables: 12.1G (Tables: 346)
[OK] Total fragmented tables: 0

-------- Analysis Performance Metrics --------------------------------------------------------------
[--] innodb_stats_on_metadata: ON
[!!] Stat are updated during querying INFORMATION_SCHEMA.

-------- 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 17h 35m 3s (1M q [7.956 qps], 55K conn, TX: 20G, RX: 87M)
[--] Reads / Writes: 84% / 16%
[--] Binary logging is disabled
[--] Physical Memory     : 3.7G
[--] Max MySQL memory    : 4.8G
[--] Other process memory: 0B
[--] Total buffers: 4.3G global + 3.8M per thread (151 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[!!] Maximum reached memory usage: 4.3G (116.89% of installed RAM)
[!!] Maximum possible memory usage: 4.8G (130.76% of installed RAM)
[!!] Overall possible memory usage with other process exceeded memory
[OK] Slow queries: 0% (17/1M)
[OK] Highest usage of available connections: 7% (12/151)
[OK] Aborted connections: 0.00%  (1/55834)
[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance
[!!] Query cache may be disabled by default due to mutex contention.
[!!] Query cache efficiency: 0.0% (0 cached / 582K selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (9 temp sorts / 1K sorts)
[OK] No joins without indexes
[!!] Temporary tables created on disk: 99% (376K on disk / 379K total)
[!!] Thread cache is disabled
[!!] Table cache hit rate: 9% (400 open / 4K opened)
[!!] table_definition_cache(400) is lower than number of tables(671)
[OK] Open file limit used: 9% (93/962)
[OK] Table locks acquired immediately: 100% (744K immediate / 744K locks)

-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is disabled.
[--] Memory used by P_S: 0B
[--] Sys schema isn't installed.

-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is enabled.
[--] Thread Pool Size: 2 thread(s).
[--] Using default value is good enough for your version (5.5.65-MariaDB)

-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.2% (781M used / 4B cache)
[!!] Key buffer size / total MyISAM indexes: 4.0G/4.3G
[!!] Read Key buffer hit rate: 86.1% (2M cached / 379K reads)
[OK] Write Key buffer hit rate: 99.2% (238 cached / 236 writes)

-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[!!] InnoDB File per table is not activated
[!!] InnoDB buffer pool / data size: 128.0M/12.1G
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (7.8125 %): 5.0M * 2/128.0M should be equal to 25%
[OK] InnoDB buffer pool instances: 1
[--] InnoDB Buffer Pool Chunk Size not used or defined in your version
[OK] InnoDB Read buffer efficiency: 99.94% (45432893 hits/ 45458201 total)
[!!] InnoDB Write Log efficiency: 65.51% (2397 hits/ 3659 total)
[OK] InnoDB log waits: 0.00% (0 waits / 6056 writes)

-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is enabled.
[OK] Aria pagecache size / total Aria indexes: 128.0M/1B
[!!] Aria pagecache hit rate: 33.0% (264 cached / 177 reads)

-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.

-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.

-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.

-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] Binlog format: STATEMENT
[--] XA support enabled: ON
[--] Semi synchronous replication Master: Not Activated
[--] Semi synchronous replication Slave: Not Activated
[--] This is a standalone server

-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
    Control warning line(s) into /var/log/mariadb/mariadb.log file
    Control error line(s) into /var/log/mariadb/mariadb.log file
    Reduce your overall MySQL memory footprint for system stability
    Dedicate this server to your database for highest performance.
    Enable the slow query log to troubleshoot bad queries
    Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1
    When making adjustments, make tmp_table_size/max_heap_table_size equal
    Reduce your SELECT DISTINCT queries which have no LIMIT clause
    Set thread_cache_size to 4 as a starting value
    Increase table_open_cache gradually to avoid file descriptor limits
    Read this before increasing table_open_cache over 64: https://bit.ly/2Fulv7r
    Read this before increasing for MariaDB https://mariadb.com/kb/en/library/optimizing-table_open_cache/
    This is MyISAM only table_cache scalability problem, InnoDB not affected.
    See more details here: https://bugs.mysql.com/bug.php?id=49177
    This bug already fixed in MySQL 5.7.9 and newer MySQL versions.
    Beware that open_files_limit (962) variable
    should be greater than table_open_cache (400)
    For MySQL 5.6.2 and lower, Max combined innodb_log_file_size should have a ceiling of (4096MB / log files in group) - 1MB.
    Before changing innodb_log_file_size and/or innodb_log_files_in_group read this: https://bit.ly/2TcGgtU
Variables to adjust:
  *** MySQL's maximum memory usage is dangerously high ***
  *** Add RAM before increasing MySQL buffer variables ***
    SET innodb_stats_on_metadata = OFF
    query_cache_size (=0)
    query_cache_type (=0)
    query_cache_limit (> 1M, or use smaller result sets)
    tmp_table_size (> 16M)
    max_heap_table_size (> 16M)
    thread_cache_size (start at 4)
    table_open_cache (> 400)
    table_definition_cache(400) > 671 or -1 (autosizing if supported)
    key_buffer_size (> 4.3G)
    innodb_file_per_table=ON
    innodb_buffer_pool_size (>= 12.1G) if possible.
    innodb_log_file_size should be (=16M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.