Copy the 35 million lines of table line 186 million
OK, I tried to accomplish this feat for the last 4 nights. There is some limitation of I/O with this storage. Basically, my boss want a subset of an array of rank 186 million recorded in another table (without causing performance degradation... so we have a window of 10 hours to do it in). Let me throw you in the fact that it's a primary on a standby dataguard... so all newspapers are shipped to the standby site. What I tried was:(a) create table TableA_subset in select * from TableA where conditon < = 10000 [returns 30 million lines] - it took more than 10 hours... was to kill him
(b) export using datapump with a query condition [query = "where conditon < = 10000"] the lines I wanted to keep - he ran for more than 10 hours... was to kill him
given the backup site turns impossible disconnection (since rebuiliding that Eve will take much too long)... Really, I have only 10 hours to get there... and I could not... AND the table continues to grow... Suggestions as to how I can get these data, truncate the existing table and return the table to the table of origin would be greatly appreciated. I tried loading direct path (despite sleep)... Help, please
JG, in my view, that there is a value of the consideration. This approach would reduce the load on the existing production server I/o. This should be feasible, as long as the test system is the same version and running on hardware of compatiable.
HTH - Mark D Powell.
Tags: Database
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