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mysql max connections

mysql max connections formula

 

 

 

 

 

 

 

 

 

mysql max connections calculator
max_connections = (Available RAM – Global Buffers) / Thread Buffers
available ram =MySQL ram
Global buffers
SHOW VARIABLES LIKE ‘%buffer%’;
innodb_buffer_pool, key_buffer_size, query_cache_size, etc
Available RAM = Global Buffers + (Thread Buffers x max_connections)
max_connections = (Available RAM – Global Buffers) / Thread Buffers
global buffers
innodb_buffer_pool_size
innodb_log_buffer_size
innodb_additional_mem_pool
net_buffer_length
total size of global buffers
thread buffers
sort_buffer_size
myisam_sort_buffer_size
read_buffer_size
join_buffer_size
read_mid_buffer_size
total threaded buffer size
generally 10% golbal buffers 1gb vs 100Mb.
max connections 151 default.
Ram= 1000+ (100*151)
1000+15100
1010+(112*27)
3024+1010=4GB.
otherway
check previous maxused connections
increase
check mysql error logs.

MySQL max connections formula

https://journeyontux.files.wordpress.com/2011/12/max_connection_measurements.xls

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