Здравствуйте,
есть сервер статистики веб приложения, на нем крутится nginx, php-fpm, memcached, mysql.
Все работает стабильно, но mysql по ТОПу почти постоянно 112-118% загрузки LA в районе 15-30 в зависимости от нагрузок.
Сервер 8 ядер по 2,4Ghz, 2Gb RAM
запросов на nginx в районе 2-3 тысяч в секунду
нагрузка на базу:
mysqladmin status -u root -p
Uptime: 1306437 Threads: 5 Questions: 1826124730 Slow queries: 0 Opens: 3274 Flush tables: 1 Open tables: 1900 Queries per second avg: 1397.790
Версия mysql:
mysql Ver 14.14 Distrib 5.7.24, for Linux (x86_64) using EditLine wrapper
Cама база очень маленькая, около 75мб
Конфиг mysql:
cat /etc/mysql/my.cnf
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
language = /usr/share/mysql/english
old_passwords = 0
bind-address = 127.0.0.1
skip-external-locking
skip-name-resolve = 1
max_allowed_packet = 16M
key_buffer_size = 16M
innodb_buffer_pool_size = 1024M
innodb_file_per_table = 1
innodb_flush_method = O_DIRECT
innodb_flush_log_at_trx_commit = 0
innodb_log_file_size = 128M
innodb_buffer_pool_instances =1
max_connections = 136
query_cache_size = 0
slow_query_log = /var/log/mysql/mysql-slow.log
long_query_time = 1
expire_logs_days = 10
max_binlog_size = 100M
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
Вывод mysql-tuner:
>> MySQLTuner 1.7.9 - 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
[OK] Logged in using credentials passed on the command line
[OK] Currently running supported MySQL version 5.7.24-0ubuntu0.18.04.1
[OK] Operating on 64-bit architecture
-------- Log file Recommendations ------------------------------------------------------------------
[--] Log file: /var/lib/mysql/ff.err(0B)
[OK] Log file /var/lib/mysql/ff.err exists
[OK] Log file /var/lib/mysql/ff.err is readable.
[!!] Log file /var/lib/mysql/ff.err is empty
[OK] Log file /var/lib/mysql/ff.err is smaller than 32 Mb
[OK] /var/lib/mysql/ff.err doesn't contain any warning.
[OK] /var/lib/mysql/ff.err doesn't contain any error.
[--] 0 start(s) detected in /var/lib/mysql/ff.err
[--] 0 shutdown(s) detected in /var/lib/mysql/ff.err
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in InnoDB tables: 75.0M (Tables: 173)
[OK] Total fragmented tables: 0
-------- Security Recommendations ------------------------------------------------------------------
[OK] There are no anonymous accounts for any database users
[!!] User 'debian-sys-maint@localhost' has no password set.
[--] Bug #80860 MySQL 5.7: Avoid testing password when validate_password is activated
-------- CVE Security Recommendations --------------------------------------------------------------
[--] Skipped due to --cvefile option undefined
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 15d 2h 57m 16s (1B q [1K qps], 96M conn, TX: 1545G, RX: 215G)
[--] Reads / Writes: 99% / 1%
[--] Binary logging is disabled
[--] Physical Memory : 1.9G
[--] Max MySQL memory : 1.2G
[--] Other process memory: 553.8M
[--] Total buffers: 1.0G global + 1.1M per thread (136 max threads)
[--] P_S Max memory usage: 72B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 1.1G (55.26% of installed RAM)
[OK] Maximum possible memory usage: 1.2G (61.47% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/1B)
[OK] Highest usage of available connections: 19% (26/136)
[OK] Aborted connections: 0.00% (29/96128595)
[OK] Query cache is disabled by default due to mutex contention on multiprocessor machines.
[OK] Sorts requiring temporary tables: 0% (562 temp sorts / 335M sorts)
[OK] No joins without indexes
[OK] Temporary tables created on disk: 0% (36 on disk / 344K total)
[OK] Thread cache hit rate: 96% (3M created / 96M connections)
[OK] Table cache hit rate: 58% (1K open / 3K opened)
[OK] Open file limit used: 0% (32/5K)
[OK] Table locks acquired immediately: 100% (148 immediate / 148 locks)
-------- Performance schema ------------------------------------------------------------------------
[--] Memory used by P_S: 72B
[--] Sys schema is installed.
-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.
-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.3% (3M used / 16M cache)
[OK] Key buffer size / total MyISAM indexes: 16.0M/43.0K
[!!] Read Key buffer hit rate: 92.2% (90 cached / 7 reads)
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[OK] InnoDB buffer pool / data size: 1.0G/75.0M
[OK] Ratio InnoDB log file size / InnoDB Buffer pool size: 128.0M * 2/1.0G should be equal 25%
[OK] InnoDB buffer pool instances: 1
[--] Number of InnoDB Buffer Pool Chunk : 8 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% (15943986118 hits/ 15943992341 total)
[!!] InnoDB Write Log efficiency: 87.68% (10367439 hits/ 11824430 total)
[OK] InnoDB log waits: 0.00% (0 waits / 1456991 writes)
Что можно подкрутить не трогая железо? или это упор и надо менять железо?
Средний
Простой
