Add calcluation of bitmap storage capacity.
< be cleared when a heap tuple is expired. Another idea is to maintain
< a bitmap of heap pages where all rows are visible to all backends,
< and allow index lookups to reference that bitmap to avoid heap
< lookups, perhaps the same bitmap we might add someday to determine
< which heap pages need vacuuming.
> be cleared when a heap tuple is expired.
> Another idea is to maintain a bitmap of heap pages where all rows
> are visible to all backends, and allow index lookups to reference
> that bitmap to avoid heap lookups, perhaps the same bitmap we might
> add someday to determine which heap pages need vacuuming. Frequently
> accessed bitmaps would have to be stored in shared memory. One 8k
> page of bitmaps could track 512MB of heap pages.
TODO (r1.1709 -> r1.1710)
TODO.html (r1.216 -> r1.217)
pgsql-committers by date
|Next:||From: User Dpage||Date: 2005-12-02 11:00:44|
|Subject: psqlodbc - psqlodbc: - skip QR_fetch_tuples when backend returns |
|Previous:||From: Bruce Momjian||Date: 2005-12-02 02:49:21|
|Subject: Re: [COMMITTERS] pgsql: Add comments about why errno is set|