How to check if a message has already been sent?

Question

bash

I check which process consumes the most memory, and I want to send the result to the mail or xmpp server, as in this case

if [[ $(ps aux | awk '{print $4}' | sort -nr | head -n 1 | sed 's/\..*//g' ) -ge 70 ]] ;\
 then ps aux | awk '$4>70' | sendxmpp -s 'Memory Load > 70%'  [email protected] ; \
fi

But if the process loads the memory constantly, then the messages will be sent non-stop.

Tell me how to check that the message has already been sent, if the process is still loading memory?

Answer 1

For notifications, you can create a lock file (just like a flag). This is how it should work (in the example we are talking about a service crash, but the essence is the same):
1. the first iteration went
- the service crashed
- check for the existence of a lock file
- the notification about the crash is gone, since the lock file does not exist
- the lock file is created
2 .the second iteration started -
the service is still down
- checking for the existence of the lock file - the
lock file exists, so we will not send the notification again that the service has risen - delete the lock file 4. the cycle continues ...
The lock file can be any file, I usually created an empty file.