Re: ** statistics for zero row table - Yes or No?
From: Julio Aguilar-Chang <jachang_at_lanl.gov>
Date: Mon, 24 Aug 2009 08:48:19 -0600
Message-ID: <4A92A833.4020507_at_lanl.gov>
Date: Mon, 24 Aug 2009 08:48:19 -0600
Message-ID: <4A92A833.4020507_at_lanl.gov>
One other thing to consider if your table is over 1MB and zero rows: if this table is being used as an intermediate table for other processing, it looks as if the application, or user, is doing a "delete" instead of a "truncate" to clear the table. This in general is bad practice because a "delete" will not reset the high water mark, while a truncate will. Oracle will have to scan 1MB worth of blocks even if the table has zero rows, i.e. another performance hit on top of incorrect statistics.
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> Going further what if the table size is over 1 MB and zero rows ?
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-- http://www.freelists.org/webpage/oracle-lReceived on Mon Aug 24 2009 - 09:48:19 CDT