hi,
my mysql is using about 70-80% every time of cpu and about 5% memory, and many times when high traffic, websites takes too long to load
could someone help me?
my server is 8 core with 32gb ram, im using cloudlinux
here is my my.cnf and mysqltuner log
my mysql is using about 70-80% every time of cpu and about 5% memory, and many times when high traffic, websites takes too long to load
could someone help me?
my server is 8 core with 32gb ram, im using cloudlinux
here is my my.cnf and mysqltuner log
Code:
[mysqld]
innodb_file_per_table=1
local-infile=0
tmpdir =/dev/shm
max_connections = 1024
max_user_connections=650
key_buffer_size = 1024M
myisam_sort_buffer_size = 64M
#default-storage-engine=MyISAM
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 256K
thread_cache_size = 384
wait_timeout = 20
connect_timeout = 10
tmp_table_size = 64M
max_heap_table_size = 64M
max_allowed_packet = 64M
net_buffer_length = 16384
max_connect_errors = 10
thread_concurrency = 16
concurrent_insert = 2
read_rnd_buffer_size = 786432
bulk_insert_buffer_size = 8M
query_cache_limit = 7M
query_cache_size = 64M
query_cache_type = 1
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
max_write_lock_count = 16
innodb_buffer_pool_size=8G #75 % of RAM
innodb_flush_log_at_trx_commit=2
innodb_thread_concurrency=8 # of cpus
innodb_flush_method=O_DIRECT
[mysqld_safe]
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer = 384M
sort_buffer = 384M
read_buffer = 256M
/////////////////////////////
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 2d 3h 25m 54s (23M q [127.290 qps], 468K conn, TX: 138G, RX: 7G)
[--] Reads / Writes: 89% / 11%
[--] Binary logging is disabled
[--] Physical Memory : 31.3G
[--] Max MySQL memory : 12.9G
[--] Other process memory: 3.9G
[--] Total buffers: 9.1G global + 3.2M per thread (1024 max threads)
[--] P_S Max memory usage: 555M
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 10.0G (31.77% of installed RAM)
[OK] Maximum possible memory usage: 12.9G (41.28% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (5K/23M)
[OK] Highest usage of available connections: 8% (85/1024)
[OK] Aborted connections: 0.55% (2598/468725)
[!!] 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.
[OK] Query cache efficiency: 61.7% (12M cached / 19M selects)
[!!] Query cache prunes per day: 1008253
[OK] Sorts requiring temporary tables: 0% (2K temp sorts / 34M sorts)
[!!] Joins performed without indexes: 150075
[!!] Temporary tables created on disk: 52% (577K on disk / 1M total)
[OK] Thread cache hit rate: 99% (85 created / 468K connections)
[!!] Table cache hit rate: 1% (2K open / 102K opened)
[OK] Open file limit used: 24% (1K/8K)
[OK] Table locks acquired immediately: 99% (38M immediate / 38M locks)
-------- Performance schema ------------------------------------------------------------------------
[--] Memory used by P_S: 555.4M
[--] Sys schema isn't installed.
-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.
-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 26.8% (287M used / 1B cache)
[OK] Key buffer size / total MyISAM indexes: 1.0G/1.5G
[OK] Read Key buffer hit rate: 100.0% (2B cached / 572K reads)
[!!] Write Key buffer hit rate: 30.1% (2M cached / 899K writes)
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 8
[OK] InnoDB File per table is activated
[OK] InnoDB buffer pool / data size: 8.0G/1.2G
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (1.171875 %): 48.0M * 2/8.0G should be equal 25%
[OK] InnoDB buffer pool instances: 8
[--] InnoDB Buffer Pool Chunk Size not used or defined in your version
[OK] InnoDB Read buffer efficiency: 100.00% (786635092 hits/ 786673138 total)
[!!] InnoDB Write Log efficiency: 51.42% (236640 hits/ 460226 total)
[OK] InnoDB log waits: 0.00% (0 waits / 223586 writes)
-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is disabled.
-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.
-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.
-------- RocksDB Metrics ---------------------------------------------------------------------------
[--] RocksDB is disabled.
-------- Spider Metrics ----------------------------------------------------------------------------
[--] Spider is disabled.
-------- Connect Metrics ---------------------------------------------------------------------------
[--] Connect 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:
/var/lib/mysql/bh1.behost.es.err is > 32Mb, you should analyze why or implement a rotation log strategy such as logrotate!
Control warning line(s) into /var/lib/mysql/bh1.behost.es.err file
Control error line(s) into /var/lib/mysql/bh1.behost.es.err file
Run OPTIMIZE TABLE to defragment tables for better performance
OPTIMIZE TABLE `modsec`.`hits`; -- can free 382.777297973633 MB
Total freed space after theses OPTIMIZE TABLE : 382.777297973633 Mb
Set up a Secure Password for [email protected] ( SET PASSWORD FOR 'user'@'SpecificDNSorIp' = PASSWORD('secure_password'); )
Restrict Host for [email protected]% to [email protected]
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
Increase table_open_cache gradually to avoid file descriptor limits
Read this before increasing table_open_cache over 64: table_cache negative scalability
Beware that open_files_limit (8192) variable
should be greater than table_open_cache (2000)
Consider installing Sys schema from GitHub - mysql/mysql-sys: The MySQL sys schema
Read this before changing innodb_log_file_size and/or innodb_log_files_in_group: MySQL :: MySQL 5.7 Reference Manual :: 14.7.2 Changing the Number or Size of InnoDB Redo Log Files
Variables to adjust:
query_cache_size (=0)
query_cache_type (=0)
query_cache_size (> 64M)
join_buffer_size (> 1.0M, or always use indexes with joins)
tmp_table_size (> 64M)
max_heap_table_size (> 64M)
table_open_cache (> 2000)
innodb_log_file_size should be (=1G) if possible, so InnoDB total log files size equals to 25% of buffer pool size.
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