System monitoring

From: Unix Administrator <unixadmin_at_gmd.com.pe>
Date: Thu, 04 Dec 1997 09:49:20 -0500

Hi all,
Three questions about system monitoring:

1. Is there a way to see how many open file descriptors are being used
by the system and how many is the system allowed to use ?

2. When you monitor the network with `netstat -a`, in the "(state)"
column there appear different status: "LISTEN", "ESTABLISHED",
"FIN_WAIT", "CLOSE_WAIT", and so on. Is there a place to look at the
meaning of these status?

3. How should be understand the info that we obtain from `vmstat`,
specifically: context switches, interrupts and page faults?. What should
we do when there is a high percentage of system CPU (from 60~70%) in use
?

Any advice is welcome. For sure, I'll summarize.
Thanks in advance
UA
Received on Thu Dec 04 1997 - 15:44:20 NZDT

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