DB Link suddenly slow

We have a database that queries the other via database link. The problem is, a job (that uses database link) that used to finish in half an hour is now taking a couple of hours. I found out that the sessions on both server are equally waiting for "SQL*Net message from dblink" and "SQL*Net message to dblink" most of the time. Network in TCP/IP level is working just fine, returning ping messages in a couple of milliseconds, so I do not understand why both databases have long wait events for DB Links. Is there some way to find out exactly what is going on? Thank you so much in advance.

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Before you buy. Received on Sat Sep 16 2000 - 11:13:31 CDT