Poor Performance of Expdp Against a Particular Table
(Doc ID 1613750.1)
Last updated on MARCH 01, 2019
Applies to:
Oracle Database - Standard Edition - Version 11.2.0.3 and laterInformation in this document applies to any platform.
Symptoms
Expdp is running very slowly against a particular table. A 10046 trace of the expdp shows that the waits are for 'db file sequential read' against the table itself, reading one block at a time, even though the internally defined parameter 'db_file_multiblock_read_count' is set to 128.
Conventional export is also slow.
An explain plan of expdp shows a full table scan is being performed.
Trying different options for the ACCESS_METHOD parameter does not make any difference.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |