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Like any system some regular maintenance will keep NMIS running smoothly, we have automated as much as we can and will continue to do so, here are a few things to check on. 

Check and Audit the configuration,

These commands tell you what folders and permissions are incorrect, and then just fix it.
/usr/local/nmis8/bin/nmis.pl type=audit
/usr/local/nmis8/bin/nmis.pl type=config

Check the NMIS code base for syntax and dependancies.

/usr/local/nmis8/admin/check_nmis_code.pl

Log rotation is the most important factor

Verify logrotate.conf is running in cron and setup for your files.

Cleaning up old RRD files periodically

cd /usr/local/nmis8/database
find . –name "*rrd" -type f -mtime +30 -print -exec rm {} \;
find . -name "*rrd" -type f -size 0 -print -exec rm {} \;

Other things

Check the runtime graphs
Check for zombie processes
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