ORACLE IMP STATISTICS参数
2016-03-17 16:34
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STATISTICS
Default: ALWAYS
Specifies what is done with the database optimizer statistics at import time.
The options are:
ALWAYS
Always import database optimizer statistics regardless of whether or not theyare questionable.
NONE
Do not import or recalculate the database optimizer statistics.
SAFE
Import database optimizer statistics only if they are not questionable. If they arequestionable, recalculate the optimizer statistics.
RECALCULATE
Do not import the database optimizer statistics. Instead, recalculate them onimport.
Default: ALWAYS
Specifies what is done with the database optimizer statistics at import time.
The options are:
ALWAYS
Always import database optimizer statistics regardless of whether or not theyare questionable.
NONE
Do not import or recalculate the database optimizer statistics.
SAFE
Import database optimizer statistics only if they are not questionable. If they arequestionable, recalculate the optimizer statistics.
RECALCULATE
Do not import the database optimizer statistics. Instead, recalculate them onimport.
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