2
votes
1answer
30 views

Is data warehouse monitoring same as database monitoring?

I have a requirement, where data warehouse population is to be monitored. I am in confusion, and needed a clear picture. Is data warehouse different than database? eg. For monitoring database we ...
0
votes
0answers
50 views

Running materialized view refresh in parallel

I have a large materialized view that is refreshed periodically (complete refresh) and I would like to do it in parallel. I can already run the query part in parallel but the problem is (much slower) ...
5
votes
2answers
766 views

Cardinality rule for bitmap indexes

The Oracle documentation includes the following advice: A bitmap index should be built on each of the foreign key columns of the fact table or tables In that reference, there is even a bitmap ...
1
vote
1answer
293 views

Force chain to start immediately after completion instead of on a timer

Is it possible to force an Oracle chain to restart immediately after it finishes executing, instead of on a timer? I have only found ways to do a temporal restart, which doesn't really work for me as ...
5
votes
3answers
1k views

Partition pruning with multiple date columns

I have a large table in Oracle 11g database that holds historical data from several years, so I would like to partition it by year. The problem is that the table has multiple date columns and they are ...
0
votes
1answer
40 views

Oracle scheduler chain priority in data warehouse applications

The scenario is as follows: We have a data warehouse type application that relies on the Oracle job scheduler and a Chain. This chain is responsible for generating materialized views (caches) that ...
9
votes
2answers
1k views

100 TeraBytes Capacity Database - Resources and Time Estimates

I am working on a 'back of the envelope' calculation for a 100TB reporting database setup. I am seeking out thoughts from the experts here. Proposed environment: Storage Capacity ~ 100TB Tables ~ ...
9
votes
1answer
5k views

Limit the degree of parallelism (DOP) available to any query

On Oracle Exadata (11gR2), we have a relatively beefy database. cpu_count is 24 parallel_server_instances is 2 parallel_threads_per_cpu is 2 We noted, through observation in Oracle Enterprise ...
1
vote
1answer
323 views

Oracle Change Data Capture: Unsubscribed column results in change set record

I am using Oracle 11g's Change Data Capture to track changes on a database table. I am using synchronous mode to minimize latency. Here's an example to illustrate my problem: Published_Table ...
2
votes
2answers
169 views

How to compare the database of a backup from another environment

Has anyone had any luck with taking a backup (approx 30 tables) from an Oracle database's live environment, then loading a test environment with this backup and doing a comparison between the test ...
5
votes
1answer
278 views

DBA's Scope in datawarehousing Projects

As a DBA trainee, what needs to be known in order to be part of datawarehousing projects? I mean what resources are suggested to have an overview knowledge of how PL/SQL and other concepts are used ...
0
votes
2answers
2k views

Possible career paths for Oracle Certified Associate (OCA) [closed]

In order to be confident in databases as a entry level job candidate, I completed the OCA certification. Now I want to know what career paths follow this. Can one go into data-mining, BI, or ...
5
votes
1answer
1k views

Do I need to enumerate the columns used in a materialized view when creating the MV log?

I'm currently creating materialized view logs on a whole bunch of tables in order to support materialized views with FAST REFRESH. The materialized views we're creating contain approx 30 columns from ...