Re: relation_byte_size()
От | Bruce Momjian |
---|---|
Тема | Re: relation_byte_size() |
Дата | |
Msg-id | 200312180346.hBI3kwk29136@candle.pha.pa.us обсуждение исходный текст |
Ответ на | relation_byte_size() (Sailesh Krishnamurthy <sailesh@cs.berkeley.edu>) |
Список | pgsql-hackers |
Patch applied. Thanks. --------------------------------------------------------------------------- Sailesh Krishnamurthy wrote: > > Hackers > > Here is the definition of relation_byte_size() in optimizer/path/costsize.c: > > ---------------------------------------------------------------------- > /* > * relation_byte_size > * Estimate the storage space in bytes for a given number of tuples > * of a given width (size in bytes). > */ > static double > relation_byte_size(double tuples, int width) > { > return tuples * (MAXALIGN(width) + MAXALIGN(sizeof(HeapTupleData))); > } > > ---------------------------------------------------------------------- > > Shouldn't this be HeapTupleHeaderData and not HeapTupleData ? > > (Of course, from a costing perspective these shouldn't be very different but ...) > > -- > Pip-pip > Sailesh > http://www.cs.berkeley.edu/~sailesh > > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html > -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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