Apache checks the current number of concurrencies

1. Check the current number of concurrent accesses to apache:

netstat -an | grep ESTABLISHED | wc -l

Compare the numerical difference between MaxClients in httpd.conf.

2, Check how many processes there are :

ps aux|grep httpd|wc -l

3, You can use the following parameters to view the data:

server-status?auto
#ps -ef|grep httpd|wc -l
1388

Count the number of httpd processes. Each request will start a process for use on the Apache server.

indicates that Apache can handle 1388 concurrent requests. This value can be automatically adjusted by Apache according to the load.

#netstat -nat|grep -i "80"|wc -l
4341

netstat -an will print the current network link status of the system, while grep -i "80" is used to extract connections related to port 80, and wc -l performs connection number statistics.

The final number returned is the total number of current requests for all 80 ports.

#netstat -na|grep ESTABLISHED|wc -l
376

netstat -an will print the current network link status of the system, and grep ESTABLISHED will extract the information of the established connection. Then wc -l statistics.

The final number returned is the total number of established connections for all current 80 ports.

netstat -nat||grep ESTABLISHED|wc - You can view detailed records of all established connections

View the number of concurrent requests for Apache and its TCP connection status:

Linux command:

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
LAST_ACK 5
SYN_RECV 30
ESTABLISHED 1597
FIN_WAIT1 51
FIN_WAIT2 504
TIME_WAIT 1057

Among them:

SYN_RECV indicates the number of requests waiting to be processed;
ESTABLISHED indicates normal data transmission status;
TIME_WAIT indicates processing Completed, the number of requests waiting for the timeout to expire.

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