I/O limit on webserver?

Question

linux

How to monitor how many I / O operations are now, how to find out what their limit is and how much is left before it?

Answer 1

how to find out what their limit
is. That's just empirically. The server will start to slow down and at the same time it is clear that it is slowing down by IO - which means that we have reached the limit.
Look at the outputs of iostat and top. I can also recommend the sar package, but a) you need to install it b) be able to cook.