tiotrom
commented
3 years ago I installed mysqltuner and these are the outputs:
mysqltuner
>> MySQLTuner 1.7.13 - 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
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password: [OK] Currently running supported MySQL version 10.3.27-MariaDB-0+deb10u1
[OK] Operating on 64-bit architecture
-------- Log file Recommendations ------------------------------------------------------------------
[--] Log file: /var/lib/mysql/trom.tf.err(1K)
[OK] Log file /var/lib/mysql/trom.tf.err exists
[!!] Log file /var/lib/mysql/trom.tf.err isn't readable.
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +Aria +CSV +InnoDB +MEMORY +MRG_MyISAM +MyISAM +PERFORMANCE_SCHEMA +SEQUENCE
[--] Data in InnoDB tables: 166.0M (Tables: 188)
[--] Data in MyISAM tables: 988.5K (Tables: 2)
[--] Data in MEMORY tables: 0B (Tables: 1)
[OK] Total fragmented tables: 0
-------- Analysis Performance Metrics --------------------------------------------------------------
[--] innodb_stats_on_metadata: OFF
[OK] No stat updates during querying INFORMATION_SCHEMA.
-------- Security Recommendations ------------------------------------------------------------------
[OK] There are no anonymous accounts for any database users
[OK] All database users have passwords assigned
[--] There are 618 basic passwords in the list.
-------- CVE Security Recommendations --------------------------------------------------------------
[OK] NO SECURITY CVE FOUND FOR YOUR VERSION
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 14h 35m 54s (4M q [89.498 qps], 35K conn, TX: 7G, RX: 774M)
[--] Reads / Writes: 95% / 5%
[--] Binary logging is disabled
[--] Physical Memory : 59.0G
[--] Max MySQL memory : 430.6M
[--] Other process memory: 7.5G
[--] Total buffers: 289.0M global + 960.0K per thread (151 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 322.8M (0.53% of installed RAM)
[OK] Maximum possible memory usage: 430.6M (0.71% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/4M)
[OK] Highest usage of available connections: 23% (36/151)
[OK] Aborted connections: 0.02% (6/35144)
[!!] 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 / 4M selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 362K sorts)
[!!] Joins performed without indexes: 322
[OK] Temporary tables created on disk: 1% (4K on disk / 274K total)
[OK] Thread cache hit rate: 99% (37 created / 35K connections)
[!!] Table cache hit rate: 0% (10 open / 1M opened)
[OK] Open file limit used: 0% (5/760)
[OK] Table locks acquired immediately: 100% (84 immediate / 84 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: 10 thread(s).
[--] Using default value is good enough for your version (10.3.27-MariaDB-0+deb10u1)
-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 50.0% (8K used / 16K cache)
[!!] Key buffer size / total MyISAM indexes: 16.0K/146.0K
[!!] Read Key buffer hit rate: 84.4% (308 cached / 48 reads)
[!!] Write Key buffer hit rate: 77.8% (18 cached / 14 writes)
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[!!] InnoDB buffer pool / data size: 128.0M/166.0M
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (75 %): 48.0M * 2/128.0M should be equal 25%
[OK] InnoDB buffer pool instances: 1
[--] Number of InnoDB Buffer Pool Chunk : 1 for 1 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: 99.83% (200488812 hits/ 200831446 total)
[!!] InnoDB Write Log efficiency: 65.91% (395724 hits/ 600368 total)
[OK] InnoDB log waits: 0.00% (0 waits / 204644 writes)
-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is enabled.
[OK] Aria pagecache size / total Aria indexes: 128.0M/1B
[!!] Aria pagecache hit rate: 89.6% (21K cached / 2K 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: MIXED
[--] XA support enabled: ON
[--] Semi synchronous replication Master: OFF
[--] Semi synchronous replication Slave: OFF
[--] This is a standalone server
-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
MySQL was started within the last 24 hours - recommendations may be inaccurate
Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1
Adjust your join queries to always utilize indexes
Increase table_open_cache gradually to avoid file descriptor limits
Read this before increasing table_open_cache over 64: http://bit.ly/1mi7c4C
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 (760) variable
should be greater than table_open_cache (10)
Performance schema should be activated for better diagnostics
Consider installing Sys schema from https://github.com/mysql/mysql-sys
Before changing innodb_log_file_size and/or innodb_log_files_in_group read this: https://bit.ly/2TcGgtU
Variables to adjust:
query_cache_size (=0)
query_cache_type (=0)
query_cache_limit (> 1M, or use smaller result sets)
join_buffer_size (> 256.0K, or always use indexes with JOINs)
table_open_cache (> 10)
performance_schema = ON enable PFS
key_buffer_size (> 146.0K)
innodb_buffer_pool_size (>= 166.0M) if possible.
innodb_log_file_size should be (=16M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.
hieronymousch
anmol26s
tio-trom
I see this warning in the admin panel:
Your table_definition_cache is too low (400). This can lead to the database error "Prepared statement needs to be re-prepared". Please set it at least to 405 (or -1 for autosizing). See here for more information.I've been talking to friendica's admins and devs here https://social.trom.tf/display/dbc8dc44-1360-3da1-2dc9-0f7804630652 but it was suggested that I also ask you here since this is a Friendica ynh install. To increase the table_definition_cache what file I should change and how. Can you please help? Cheers!