Thread: Re: [COMMITTERS] pgsql: Implement prefetching via posix_fadvise() for bitmap index scans.
Re: [COMMITTERS] pgsql: Implement prefetching via posix_fadvise() for bitmap index scans.
From
Greg Stark
Date:
I sent a message describing where I was headed with the code and my misgivings with Tom's concerns. I haven't seen any responses. Hmmm. I can't find my message however so now I'm wondering if it ever hit the lists. -- Greg On 6 Feb 2009, at 18:13, Bruce Momjian <bruce@momjian.us> wrote: > Tom Lane wrote: >> Log Message: >> ----------- >> Implement prefetching via posix_fadvise() for bitmap index scans. >> A new >> GUC variable effective_io_concurrency controls how many concurrent >> block >> prefetch requests will be issued. >> >> (The best way to handle this for plain index scans is still under >> debate, >> so that part is not applied yet --- tgl) > > Where are we on completing this feature? > > -- > Bruce Momjian <bruce@momjian.us> http://momjian.us > EnterpriseDB http://enterprisedb.com > > + If your life is a hard drive, Christ can be your backup. + > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers
Re: [COMMITTERS] pgsql: Implement prefetching via posix_fadvise() for bitmap index scans.
From
Robert Haas
Date:
On Sat, Feb 7, 2009 at 9:46 AM, Greg Stark <greg.stark@enterprisedb.com> wrote: > I sent a message describing where I was headed with the code and my > misgivings with Tom's concerns. I haven't seen any responses. > > Hmmm. I can't find my message however so now I'm wondering if it ever hit > the lists. I know it did, because I remember reading it. <searches> http://archives.postgresql.org/message-id/87eiynlhbt.fsf@oxford.xeocode.com ...Robert