On Fri, Sep 2, 2016 at 1:17 PM, Andres Freund wrote:
> On 2016-09-02 13:05:37 -0400, Tom Lane wrote:
>> Anderson Carniel writes:
>> > 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
On 2016-09-02 13:05:37 -0400, Tom Lane wrote:
> Anderson Carniel writes:
> > 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. Th
Anderson Carniel 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
The unexpected errors are problems to free the memory that was previously
allocated with posix_memalign. After a number of memory allocation and free
calls, the next free call crashes the system.
On the other hand, if I replace the posix_memalign and the free calls for
the following malloc/free al
On 2 September 2016 at 01:12, Anderson Carniel wrote:
> Dear all,
>
> I am developing an extension for the PostgreSQL that write/read some
> external files from the PostgreSQL. In order to write/read, I am using the
> O_DIRECT flag and using the posix_memalign to allocate memory. I would like
> to
Dear all,
I am developing an extension for the PostgreSQL that write/read some
external files from the PostgreSQL. In order to write/read, I am using the
O_DIRECT flag and using the posix_memalign to allocate memory. I would like
to know if the postgresql internal library provides an equivalent fu
