Oracle: Slow connections

by Wolfram Saringer  (2013-07-18)
last change: 2013-07-18

If connecting to an Oracle instance is slow but queries themselves are OK try tnsping. If that takes more than 100ms take a look at your DNS configuration.

Check if name resolution works with all DNS servers configured in /etc/resolv.conf. Check for redundant domain entries as well.

Another possible cause may be a large listener log file. Location can be found with 'lsnrctl status'

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