Posted by kalinga on 08/04/05 18:56

On 8/4/05, kalinga <kalinga@gmail.com> wrote:
> On 8/4/05, Kristen G. Thorson <kthorson@allegroconsultants.com> wrote:
> > I can say from personal experience that gethostbyaddr() and
> > gethostbyname() can seem almost randomly slow, depending on machine, OS,
> > software, who knows. I'm not smart enough to figure out the reason why
> > it can vary so much on machines with nearly the same configuration, but
> > I can tell you that it works perfectly fast most of the time. Then
> > there's that other 5% where something makes it slow as molasses.
> >
> > I have two machines that are so similar it's not funny, but
> > gethostbyname() takes 1/10 s on one, and 5 s on the other. I have yet
> > to figure out what's the difference between them that causing this.

if you are quering a external host, the bad network conditions may
cause delay in results.

if your server is connected to a heavily loaded hub/ cheap switch, or
the target hosts DNS servers are poorly configured/ slow in responce
it adds further delay to your result.

try dig/ nslookup on your server for the target hostname/address, you
may experience the same delay as with the php function.


~viraj.

> >
> >
> > kgt
> >
> >
> >
> > Dotan Cohen wrote:
> >
> > >Hi all, I just discovered the gethostbyaddr() function. By reading the
> > >user contributed notes, I get the impression that either this function
> > >may cause performance problems, or a user-contributed function based
> > >upon it may be slow. So, is gethostbyaddr() slow? Is it dangerous?
> > >Thanks!
> > >
> > >Dotan Cohen
> > >http://lyricslist.com/lyrics/artist_albums/56/bangles.php
> > >The Bangles Song Lyrics
> > >
> > >
> > >
> >
> > --
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> >
> >
>

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