Should I open a phab ticket on this?
Yes please.
On Thu, Jun 25, 2020 at 2:55 PM Roy Smith <roy(a)panix.com> wrote:
>
> Heh, my mail about NFS being involved cross paths with yours. Thanks for digging
into this for me.
>
Should I open a phab ticket on this?
>
>
> > On Jun 25, 2020, at 3:50 PM, YiFei Zhu <zhuyifei1999(a)gmail.com> wrote:
> >
> > Looks like writev syscall does happen instantly, and tail on the host
> > that is running the uwsgi process is also returning the newly written
> > data instantly. Tail on a bastion host seems to see seconds of delay
> > for me, whether I use `tail -f` `tail -F` or `watch tail`. However,
> > the delay is gone if I use `tail -f` on the uwsgi host. Looks like the
> > kernel is buffering the data...
> >
> > YiFei Zhu
> >
> > On Thu, Jun 25, 2020 at 8:12 AM Roy Smith <roy(a)panix.com> wrote:
> >>
> >>
https://tools.wmflabs.org/spi-tools/spi/
> >>
> >> To generate a request, click the "Sock Info" button or the
"Index" link.
> >>
> >> The log file is /data/project/spi-tools/uwsgi.log
> >>
> >> Thanks.
> >>
> >>
> >>
> >> On Jun 25, 2020, at 2:12 AM, YiFei Zhu <zhuyifei1999(a)gmail.com>
wrote:
> >>
> >> My guess is output stream buffering, at either the libc level or the
> >> python level.
> >>
> >> Which tool is this? I can probably strace and see if that is the case.
> >>
> >> YiFei Zhu
> >>
> >>
> >> On Wed, Jun 24, 2020 at 10:16 PM Roy Smith <roy(a)panix.com> wrote:
> >>
> >>
> >> I'm running a web server with "webservice --backend=kubernetes
python3.7". As I tail the uwsgi.log file, requests to my server get logged with very
long delays. I just timed one at about a minute and a half between when the request was
served (03:07:57 UTC 2020) and when it showed up in the log file (03:09:23 UTC 2020).
> >>
> >> What is going on here? Is there some way to make it not do this?
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