| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org, Josh Berkus <josh(at)agliodbs(dot)com> |
| Subject: | Re: huge tlb support |
| Date: | 2012-07-03 03:18:04 |
| Message-ID: | 9331.1341285484@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Fri, Jun 29, 2012 at 3:52 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
>> In a *very* quick patch I tested using huge pages/MAP_HUGETLB for the mmap'ed
>> memory.
> So, considering that there is required setup, it seems that the
> obvious thing to do here is add a GUC: huge_tlb_pages (boolean).
> The other alternative is to try with MAP_HUGETLB and, if it fails, try
> again without MAP_HUGETLB.
+1 for not making people configure this manually.
Also, I was under the impression that recent Linux kernels use hugepages
automatically if they can, so I wonder exactly what Andres was testing
on ...
regards, tom lane
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