[nos_admin@hun25-13v mysqltuner]$ perl mysqltuner.pl --host 127.0.0.1
 >>  MySQLTuner 1.7.25 - Major Hayden <[email protected]>
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.pl/
 >>  Run with '--help' for additional options and output filtering

[--] Skipped version check for MySQLTuner script
[--] Performing tests on 127.0.0.1:3306
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password: [OK] Currently running supported MySQL version 8.0.25
[OK] Operating on 64-bit architecture

-------- Log file Recommendations ------------------------------------------------------------------
[OK] Log file /var/log/mysqld.log exists
[--] Log file: /var/log/mysqld.log(1018K)
[OK] Log file /var/log/mysqld.log is not empty
[OK] Log file /var/log/mysqld.log is smaller than 32 Mb
[OK] Log file /var/log/mysqld.log is readable.
[!!] /var/log/mysqld.log contains 1004 warning(s).
[!!] /var/log/mysqld.log contains 514 error(s).
[--] 609 start(s) detected in /var/log/mysqld.log
[--] 1) 2021-05-11T08:32:26.199637Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.25'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server - GPL.
[--] 2) 2021-05-11T08:32:12.126087Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
[--] 3) 2021-05-09T10:09:05.539727Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.24'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server - GPL.
[--] 4) 2021-05-09T10:09:05.320332Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
[--] 5) 2021-05-09T10:06:21.411199Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.24'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server - GPL.
[--] 6) 2021-05-09T10:06:02.553875Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
[--] 7) 2021-03-03T09:28:58.408553Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.23'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server - GPL.
[--] 8) 2021-03-03T09:28:57.145339Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
[--] 9) 2021-02-09T12:39:03.202371Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.23'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server - GPL.
[--] 10) 2021-02-09T12:39:03.033540Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
[--] 92 shutdown(s) detected in /var/log/mysqld.log
[--] 1) 2021-05-11T08:32:01.244619Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.24)  MySQL Community Server - GPL.
[--] 2) 2021-05-09T10:08:16.094767Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.24)  MySQL Community Server - GPL.
[--] 3) 2021-05-09T10:05:54.130971Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.23)  MySQL Community Server - GPL.
[--] 4) 2021-03-03T09:28:49.348412Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.23)  MySQL Community Server - GPL.
[--] 5) 2021-02-09T12:36:32.417994Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.23)  MySQL Community Server - GPL.
[--] 6) 2021-02-09T12:34:31.303215Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22)  MySQL Community Server - GPL.
[--] 7) 2021-02-04T08:30:50.740734Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22)  MySQL Community Server - GPL.
[--] 8) 2021-01-13T07:51:18.048343Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22)  MySQL Community Server - GPL.
[--] 9) 2020-12-14T10:00:52.508504Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22)  MySQL Community Server - GPL.
[--] 10) 2020-11-18T11:29:53.051294Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22)  MySQL Community Server - GPL.

-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in MyISAM tables: 22.9M (Tables: 18)
[--] Data in InnoDB tables: 59.0G (Tables: 402)
[OK] Total fragmented tables: 0

-------- Analysis Performance Metrics --------------------------------------------------------------
[--] innodb_stats_on_metadata: OFF
[OK] No stat updates during querying INFORMATION_SCHEMA.

-------- Security Recommendations ------------------------------------------------------------------
[--] Skipped due to unsupported feature for MySQL 8

-------- CVE Security Recommendations --------------------------------------------------------------
[OK] NO SECURITY CVE FOUND FOR YOUR VERSION

-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 24d 0h 2m 18s (85M q [41.280 qps], 1M conn, TX: 1062G, RX: 35G)
[--] Reads / Writes: 85% / 15%
[--] Binary logging is enabled (GTID MODE: OFF)
[--] Physical Memory     : 23.4G
[--] Max MySQL memory    : 16.9G
[--] Other process memory: 0B
[--] Total buffers: 16.0G global + 5.6M per thread (151 max threads)
[--] P_S Max memory usage: 72B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 16.1G (68.96% of installed RAM)
[OK] Maximum possible memory usage: 16.9G (72.16% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/85M)
[OK] Highest usage of available connections: 9% (14/151)
[OK] Aborted connections: 0.02%  (322/1974426)
[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance
[--] Query cache have been removed in MySQL 8
[OK] Sorts requiring temporary tables: 3% (318K temp sorts / 8M sorts)
[!!] Joins performed without indexes: 4665466
[OK] Temporary tables created on disk: 0% (585 on disk / 13M total)
[OK] Thread cache hit rate: 99% (14 created / 1M connections)
[!!] Table cache hit rate: 0% (2K open / 1M opened)
[OK] table_definition_cache(1400) is upper than number of tables(747)
[OK] Open file limit used: 0% (2/10K)
[OK] Table locks acquired immediately: 100% (143K immediate / 143K locks)
[OK] Binlog cache memory access: 99.99% (6909316 Memory / 6910312 Total)

-------- Performance schema ------------------------------------------------------------------------
[--] Memory used by P_S: 72B
[--] Sys schema is installed.

-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.

-------- MyISAM Metrics ----------------------------------------------------------------------------
[--] MyISAM Metrics are disabled on last MySQL versions.

-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[!!] InnoDB buffer pool / data size: 16.0G/59.0G
[OK] Ratio InnoDB log file size / InnoDB Buffer pool size: 2.0G * 2/16.0G should be equal to 25%
[OK] InnoDB buffer pool instances: 16
[--] Number of InnoDB Buffer Pool Chunk : 16 for 16 Buffer Pool Instance(s)
[OK] Innodb_buffer_pool_size aligned with Innodb_buffer_pool_chunk_size & Innodb_buffer_pool_instances
[OK] InnoDB Read buffer efficiency: 100.00% (185116977940 hits/ 185118987101 total)
[OK] InnoDB Write log efficiency: 91.75% (240921469 hits/ 262594002 total)
[OK] InnoDB log waits: 0.00% (0 waits / 21672533 writes)

-------- Aria Metrics ------------------------------------------------------------------------------
[--] Aria Storage Engine not available.

-------- 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: ROW
[--] 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/mysqld.log file
    Control error line(s) into /var/log/mysqld.log file
    Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1
    We will suggest raising the 'join_buffer_size' until JOINs not using indexes are found.
             See https://dev.mysql.com/doc/internals/en/join-buffer-size.html
             (specially the conclusions at the bottom of the page).
    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 (10000) variable
    should be greater than table_open_cache (2000)
Variables to adjust:
    join_buffer_size (> 768.0K, or always use indexes with JOINs)
    table_open_cache (> 2000)
    innodb_buffer_pool_size (>= 59.0G) if possible.