| From: | Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> |
|---|---|
| To: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
| Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal: In-Place upgrade concept |
| Date: | 2007-07-03 11:31:13 |
| Message-ID: | 468A3381.3060907@sun.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Heikki Linnakangas wrote:
> Gregory Stark wrote:
>
>> Conceivably we could grab another infomask bit to indicate "uses
>> new-style
>> varlenas" and then have heaptuple.c understand how to convert them in
>> place.
>> But that leads to a ton of memory management or page locking problems.
>
> My thinking is that when a page in the old format is read in, it's
> converted to the new format before doing anything else with it.
Yes, I agree with Heikki. Any other place for conversion will generate a
big complexity of maintanace.
Zdenek
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Martijn van Oosterhout | 2007-07-03 12:59:19 | Re: Proposal: In-Place upgrade concept |
| Previous Message | Heikki Linnakangas | 2007-07-03 11:05:07 | Re: Proposal: In-Place upgrade concept |