| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, David Fetter <david(at)fetter(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Decrease MAX_BACKENDS to 2^16 |
| Date: | 2014-04-28 14:57:12 |
| Message-ID: | 12395.1398697032@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2014-04-28 10:03:58 -0400, Tom Lane wrote:
>> What I find much more worrisome about Andres' proposals is that he
>> seems to be thinking that there are *no* other changes to the buffer
>> headers on the horizon.
> Err. I am not thinking that at all. I am pretty sure I never made that
> argument. The reason I want to limit the number of connections is it
> allows *both*, shrinking the size of BufferDescs due to less alignment
> padding *and* stuffing the refcount and flags into one integer.
Weren't you saying you also wanted to stuff the usage count into that same
integer? That's getting a little too tight for my taste, even if it would
fit today.
regards, tom lane
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