On 7/23/07, Alvaro Herrera <[EMAIL PROTECTED]> wrote:
Certainly it doesn't prevent starvation completely -- really there is no way to completely prevent starvation unless you have as many workers as you have tables, and one disk for each. What DSM does do is let the big tables be vacuumed quickly which makes most of the problem go away.
Frankly I haven't seen DSM results very closely, but DSM can help us avoid full heap scans (and thats a big thing!), but it can't avoid the associated index scans and that might limit our ability to vacuum very large tables frequently. Thanks, Pavan -- Pavan Deolasee EnterpriseDB http://www.enterprisedb.com
