PHP and MySQL performance tuning notes

PHP tutorials and MySQL tutorial performance tuning notes

The larger the tmp_table_size=200m tmp_table_size, the smaller the probability of being converted to a disk TMP table

PHP Program page MySQL closed in time

Set the MySQL timeout time
Low-priority-updates set query and update priority and

tmp_table_size=200m; The greater the use of memory, the more
Low_priority_updates = no; set Read priority
Wait_timeout = 10; It'll take about 10 seconds.
table_cache=1024; The larger the physical memory, the larger the setting. The default is 2402, tuned to 512-1024 best
Key_buffer_size =1024m;
Sort_buffer_size = 256m;
Read_buffer_size = 1024m;
Join_buffer_size = 512m;
Read_rnd_buffer_size = 1024m; User ORDER by sort
max-seeks-for-key=1000; Limit keyword Scan does not exceed 1,000 times keyword search

According to the general MySQL Memory computing company:
1) system use, assuming that 800m is reserved;
2 thread exclusive, about 4.5GB = 151 * (10m + 10m + 5m + 5m + 512k), the composition is approximately as follows:
sort_buffer_size:10m
join_buffer_size:10m
Read_buffer_size:5m
Read_rnd_buffer_size:5m
thread_stack:512kb
3) MyISAM Key cache
Key_buffer_size 2.4g
4 InnoDB buffer pool: ignored, the system currently does not have a InnoDB storage engine table.

MySQL connection number single CPU preferably not more than 300