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Please describe the host system e.g. processors and memory, please also let us know if there is anything else other than this Oracle instance running on the particular host.
Please describe database in terms of size - total space allocation, size of the five larger tables.
You mentioned performance gets hurt "after the bulk load or bulk import". In regards to this item... 1) how many tables are getting loaded?... 2) how many rows are involved in each load?... 3) What are the size of load target tables in number of rows?
Is there any process gathering performance statistics?
You also mention database was shutdown/startup because of performance/hanging issues... did shutdown/startup the instance solved those issues?
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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