Re: Bottlenecks with large number of relation segment files

On 2013-08-05 18:40:10 +0900, KONDO Mitsumasa wrote:
> (2013/08/05 17:14), Amit Langote wrote:
> >So, within the limits of max_files_per_process, the routines of file.c
> >should not become a bottleneck?
> It may not become bottleneck.
> 1 FD consumes 160 byte in 64bit system. See linux manual at "epoll".

That limit is about max_user_watches, not the general cost of an
fd. Afair they take up a a good more than that. Also, there are global
limits to the amount of filehandles that can simultaneously opened on a
system.


Greetings,

Andres Freund

--
 Andres Freund                       http://www.2ndQuadrant.com/
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