I agree with the optimizer question. At least a few versions ago, joining
tables across a database link had poor performance. Anybody know if still true.
And, (not but), if you're using sqlplus for this this traffic please be sure"Mark W. Farnham" <mwf@xxxxxxxx> 10/31/18 12:54 PM >>>
"Hameed, Amir" <Amir.Hameed@xxxxxxxxx> hat am 30. Oktober 2018 um 14:01bit better.
geschrieben:
Hi,
I have two databases running on the same physical server. The OS is RHEL7.
Database A is 11.2.0.4 and is running as Active Data Guard. Database B is a
reporting database and is version 12.1.0.2. In the past, database A was
running on Solaris (four-node RAC) and we were using Oracle Streams to
replicate over 400 tables from this particular database over to database B.
We were also replicating tables from multiple other databases to database B
but that is beside the point for this discussion. After we converted database
A to LINUX, we decided to keep database B as the front-end and created
synonyms to access tables from database A (ADG) using DB links. We have also
setup IPC communication between A and B assuming that IPC would be faster
than TCP. Unless I have misconfigured IPC, so far the performance of
accessing database from B-to-A over a DB link is abysmal. Before I ask users
to start accessing A directly instead of going through B, I wanted to
understand the IPC communication a
--
In my scenario where both databases reside on the same physical server, is
there a way to optimize access from B-to-A over a DB link?
Thank you,
Amir