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On the proxy, file descriptors are very important, because if the proxy reaches its limit, it will no longer be able to create new connections.
There will be a risk of crash or high latency.
Before checking the number of file descriptors for the proxy, it is necessary to check the limit on the system.
In fact, you won't be able to increase the number of descriptors for the proxy beyond the system limit.
The command
cat /proc/sys/fs/file-max
Shows you the max number of file descriptors available for the system.
In our case it is 80 128 so we can't increase the proxy limit to more than 80 128
The command
squidclient -h 127.0.0.1 -p `cat /etc/artica-postfix/settings/Daemons/SqSquidMgrListenPort` mgr:info |grep "file descriptors:"
it output 3 lines, example:
Maximum number of file descriptors: 17408 Available number of file descriptors: 17328 Reserved number of file descriptors: 400