Oracle Database Discussions

Hi,

I have a database on my own site (Quebec) that has 36 materialized views refresh by a master table site that is physically at Montreal. The MVIEWs are refreshed every day of the week (monday to friday) at 7h00 until 19h00. We use the "fast refresh" technic to refresh the materialized views.

Last weekend, I transfered this database on a new server. So, I created a new SID (I rename the old SID "ORCL" by "ATQP") and I created this instance with a DB_BLOCK_SIZE of 16k rather than 8k. It's the only difference between the two instances (the old one and the new one). I also created the owner schema "ATQP" and I made an Export on the old server followed by an Import of the schema that owned the Materialized views (not a Full import) on the new server. The export was made many hours (saturday morning) after the last refresh of the week (friday, at 19h00) on the old server.

After the successul import on my new server, I'm looking for the information about the creation of the MVIEW. Everything seems OK. I can see that the last refresh date indicated "2008-02-22 19:00" (date / time of the last refresh of the week). I made a quick test on a small MVIEW (a fast refresh) and it worked, no error.

Yesterday morning, the DBA of the master table site mentionned us that the DELETE on the MLOGS didn't work on the master site. The refresh was made successfully but the MLOGS continue to grow up, again and again ... On my database, I'm looking in the SYS.SNAP$ table and I saw that the SNAPTIME date is '1950-01-01 12:00' rather than '2008-02-25 19:00'. In the SYS.SNAP_REFTIME, the SNAPTIME is OK but the LOADERTIME column contains the same strange date '1950-01-01 12:00'.

I made a quick check on my old server and the SYS.SNAP$ table is empty !!! I think it's normal because the last refresh on this node was made last friday night and I made the transfert last saturday (I shutdown the old database after).

I know how to solve the problem, by recreate the MVIEW, but it causes a big problem for us. We are in PRODUCTION and we don't want to refresh many millions of records. I think it will take a couple of days to refresh all the materialized views of my schema. And it doesn't sound good by the master table site management team ...

The master table site "rush" us to solve the problem before the weekend. They don't want that we overcharge the network link between them and us by refreshing those MVIEWS.

So, is it possible to make something simple to resynchronized the SNAPTIME date without refreshing completely all the materialized views ?

If the master site table recreate the MLOG (purge manually), is it possible that it will solve our problem ?

Is it also possible to recreate the MVIEW without refreshing the data (specify to Oracle to recreate the MVIEW but indicate that the table associated already exist) ?

All of my materialized view are up to date concerning the data. I don't want to refresh all of it.

Thank's in advance ...