重新启动MySQL使应用程序更快

Question

I have a Drupal 7 application running a large Mysql database. It's built on AWS instance (30GB RAM, 8 CPU). Below is the my.cnf copy.

Issue is that my application gets noticeably fast when I restart the mysql which makes me think that current configuration isn't optimal and once the caches get filled, they slow down the server speed.

Any experts who could point out the issue here?

 [mysqld] # moving datadir to /media/db ebs storage datadir=/media/db/mysql socket=/var/lib/mysql/mysql.sock tmpdir=/dev/shm/ # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 local-infile=0 log-warnings=2 skip-external-locking bind-address = 127.0.0.1 expire_logs_days = 1 max_binlog_size = 100M log-bin=bin.log log-bin-index=bin-log.index binlog_format=row key_buffer_size = 512M max_allowed_packet = 32M thread_stack = 292K myisam_sort_buffer_size = 64M thread_cache_size = 50 myisam-recover = BACKUP max_connections = 100 max_user_connections = 150 table_cache = 16384 table_open_cache = 10240 table_definition_cache = 4096 thread_concurrency = 8 join_buffer_size = 4M query_cache_type = 1 query_cache_limit = 256K query_cache_min_res_unit = 2k query_cache_size = 200M innodb_buffer_pool_size= 8G tmp_table_size=64M max_heap_table_size=64M wait_timeout=50 interactive_timeout=50 connect_timeout=10 open-files-limit = 65535 innodb_flush_log_at_trx_commit = 0 innodb_large_prefix=true innodb_file_format=barracuda innodb_file_per_table=true table_open_cache = 5000 innodb_log_buffer_size= 32M innodb_log_file_size = 512m read_rnd_buffer_size = 8M transaction-isolation = READ-COMMITTED innodb_lock_wait_timeout = 25 innodb_write_io_threads = 16 innodb_sync_spin_loops = 200 innodb_spin_wait_delay = 24 innodb_read_io_threads = 16 innodb_flush_method = O_DIRECT innodb_buffer_pool_instances = 8 innodb_autoinc_lock_mode = 2 [mysqldump] max_allowed_packet = 32M [isamchk] key_buffer = 32M [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid set-variable=long_query_time=1 long_query_time=10 slow_query_log_file =/var/log/mysql/mysql-slow.log 

Answer 1

Rate Per Second=RPS - Suggestions for your my.cnf [mysqld] section

read_rnd_buffer_size=256K  # from 8M to reduce handler_read_rnd_next RPS
innodb_lru_scan_depth=100  # from 1024 to reduce CPU cycles used every SECOND
query_cache_min_res_unit=512  # from 2K to store more RESULTS in same query_cache_size

The BEST to you.