| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Anderson Carniel <accarniel(at)gmail(dot)com> |
| Cc: | Craig Ringer <craig(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: What is the posix_memalign() equivalent for the PostgreSQL? |
| Date: | 2016-09-02 17:05:37 |
| Message-ID: | 19198.1472835937@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Anderson Carniel <accarniel(at)gmail(dot)com> writes:
> I would like to know if the PostgreSQL provides a memory function that
> allocates aligned memory.
Not beyond MAXALIGN (although the shared-memory alloc functions do align
to cacheline boundaries IIRC).
> If not, according to your experience, is there a
> significance difference between the performance of the O_DIRECT or not?
AFAIK, nobody's really bothered to measure whether that would be useful
for Postgres. The results would probably be quite platform-specific
anyway.
regards, tom lane
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