Hi,

In some occasions, we experience high load on the
server (like around 9.5) and some hosts can't connect
to the database via 1521 port and get this "ORA-12203:
TNS:unable to connect to destination " errror.

When this happens, I tried testing it via tnsping and
it was indeed timing out with 12203 errors. The
database is behind the firewall and only port 22, 1521
is opened. I also experience some problem connecting
to 1521 port from the same host. I wonder if having
multiple listeners would alleviate this?

benny


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