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oracle 11.2.0.4 : expdp with compression=all is very slow?

user7046610Dec 13 2018 — edited Jan 2 2019

env:

oracle 11.2.0.4 rac

10000M/s network

mount the nfs filesystem on /orabak as the destination of dumpfiles

when i am using the compression=all parameter to dump a 80G schema ,the nfs write speed is 10-20MB

when i am not using the compression=all parameter to dump a 80G schema,the nfs write speed is 300-400MB

anyone knows why?Is this normal?

thasks a lot!

Added on Dec 13 2018

#database-key-features, #export-import-sql-loader-external-tables

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