Igor Z.

Registered
Jul 12, 2019
2
0
1
Italy
cPanel Access Level
Root Administrator
Hi I'm configuring a CentOS 7 VPS with 4 vCore and 24gb of RAM, I installed cPanel and I'm using it to host 2 Wordpress sites. There are 2 small dbs, totally about 400MB.

The sites in production will have about 10k visits monthly, now the visits are low.

Mysqld uses high cpu, about 80-120%, without processes on SQL. I didn't edit default SQL configuration, how can I set my db options?

Should you have some advice for my.cnf? I could keep the entire database on RAM, is it bad?

I launched mysqltuner, this is the result, I tried to edit my.cnf and restart, but it's in the same situation.

Code:
query_cache_size (=0)
query_cache_type (=0)
query_cache_limit (> 1M, or use smaller result sets)
sort_buffer_size (> 256K)
read_rnd_buffer_size (> 256K)
tmp_table_size (> 16M)
max_heap_table_size (> 16M)
performance_schema = ON enable PFS
innodb_buffer_pool_size (>= 318.0M) if possible.
innodb_log_file_size should be (=16M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.
Thank you.
 

Igor Z.

Registered
Jul 12, 2019
2
0
1
Italy
cPanel Access Level
Root Administrator
This is the complete report after 2 days. I can't modify previous post. Thank you.

Code:
[--] Skipped version check for MySQLTuner script
[OK] Logged in using credentials passed on the command line
[OK] Currently running supported MySQL version 5.7.26
[OK] Operating on 64-bit architecture

-------- Log file Recommendations ------------------------------------------------------------------
[--] Log file: /var/log/mysqld.log(570K)
[OK] Log file /var/log/mysqld.log exists
[OK] Log file /var/log/mysqld.log is readable.
[OK] Log file /var/log/mysqld.log is not empty
[OK] Log file /var/log/mysqld.log is smaller than 32 Mb
[!!] /var/log/mysqld.log contains 107 warning(s).
[!!] /var/log/mysqld.log contains 2702 error(s).
[--] 24 start(s) detected in /var/log/mysqld.log
[--] 1) 2019-07-12T08:42:40.196023Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 2) 2019-07-12T08:35:53.475244Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 3) 2019-07-12T08:33:59.155403Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 4) 2019-07-12T08:33:55.083171Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 5) 2019-07-10T08:55:22.967123Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 6) 2019-07-10T08:50:29.777561Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 7) 2019-07-10T08:47:25.039566Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 8) 2019-07-10T08:45:06.438441Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 9) 2019-07-10T08:16:36.170767Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 10) 2019-07-05T08:06:45.717190Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 44 shutdown(s) detected in /var/log/mysqld.log
[--] 1) 2019-07-12T08:41:52.967851Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 2) 2019-07-12T08:35:48.919495Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 3) 2019-07-12T08:33:57.050194Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 4) 2019-07-12T08:33:50.686294Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 5) 2019-07-12T08:33:46.827841Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 6) 2019-07-12T08:33:40.833353Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 7) 2019-07-12T08:33:37.082075Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 8) 2019-07-12T08:33:33.540923Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 9) 2019-07-12T08:33:30.271090Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 10) 2019-07-12T08:33:27.018529Z 0 [Note] /usr/sbin/mysqld: Shutdown complete

-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in InnoDB tables: 318.0M (Tables: 96)
[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

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

-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 2d 22h 2m 8s (114M q [455.795 qps], 69K conn, TX: 1059G, RX: 75G)
[--] Reads / Writes: 99% / 1%
[--] Binary logging is disabled
[--] Physical Memory     : 22.8G
[--] Max MySQL memory    : 338.9M
[--] Other process memory: 0B
[--] Total buffers: 169.0M global + 1.1M per thread (151 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 178.0M (0.76% of installed RAM)
[OK] Maximum possible memory usage: 338.9M (1.45% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/114M)
[OK] Highest usage of available connections: 5% (8/151)
[OK] Aborted connections: 1.03%  (712/69411)
[!!] 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 / 113M selects)
[OK] Query cache prunes per day: 0
[!!] Sorts requiring temporary tables: 17% (406K temp sorts / 2M sorts)
[!!] Joins performed without indexes: 3603
[!!] Temporary tables created on disk: 81% (1M on disk / 1M total)
[OK] Thread cache hit rate: 99% (8 created / 69K connections)
[OK] Table cache hit rate: 20% (1K open / 9K opened)
[OK] Open file limit used: 0% (79/10K)
[OK] Table locks acquired immediately: 100% (888 immediate / 888 locks)

-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is disabled.
[--] Memory used by P_S: 0B
[--] Sys schema is installed.

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

-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.4% (1M used / 8M cache)
[OK] Key buffer size / total MyISAM indexes: 8.0M/43.0K
[OK] Read Key buffer hit rate: 99.2% (2K cached / 17 reads)

-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[!!] InnoDB buffer pool / data size: 128.0M/318.0M
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (75 %): 48.0M * 2/128.0M should be equal to 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: 100.00% (33049906110 hits/ 33050550153 total)
[!!] InnoDB Write Log efficiency: 18.15% (110271 hits/ 607553 total)
[OK] InnoDB log waits: 0.00% (0 waits / 497282 writes)

-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is disabled.

-------- 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
    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 which have no LIMIT clause
    Performance schema should be activated for better diagnostics
    Before changing innodb_log_file_size and/or innodb_log_files_in_group read this:
Variables to adjust:
    query_cache_size (=0)
    query_cache_type (=0)
    query_cache_limit (> 1M, or use smaller result sets)
    sort_buffer_size (> 256K)
    read_rnd_buffer_size (> 256K)
    join_buffer_size (> 256.0K, or always use indexes with JOINs)
    tmp_table_size (> 16M)
    max_heap_table_size (> 16M)
    performance_schema = ON enable PFS
    innodb_buffer_pool_size (>= 318.0M) if possible.
    innodb_log_file_size should be (=16M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.
 

cPanelMichael

Technical Support Community Manager
Staff member
Apr 11, 2011
47,862
2,216
363
cPanel Access Level
DataCenter Provider
Twitter
Hello @Igor Z.,

Advice about tuning specific configuration values typically requires the help of a qualified system administrator. I'll leave this thread open for additional user-feedback, but I did want to note the "mysqladmin processlist" command is helpful if you are noticing poor MySQL performance. The command can help determine if any specific databases are responsible for the poor performance.

You can also find a list of companies offering system administration services if you do not receive sufficient user-feedback to this thread:

System Administration Services | cPanel Forums

Thank you.