https://phabricator.wikimedia.org/T256426 <https://phabricator.wikimedia.org/T256426>
> On Jun 25, 2020, at 4:00 PM, YiFei Zhu <zhuyifei1...@gmail.com> wrote: > >> Should I open a phab ticket on this? > > Yes please. > > On Thu, Jun 25, 2020 at 2:55 PM Roy Smith <r...@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 <zhuyifei1...@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 <r...@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 <zhuyifei1...@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 <r...@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? >>>> _______________________________________________ >>>> Wikimedia Cloud Services mailing list >>>> Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) >>>> https://lists.wikimedia.org/mailman/listinfo/cloud >>>> >>>> >>>> _______________________________________________ >>>> Wikimedia Cloud Services mailing list >>>> Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) >>>> https://lists.wikimedia.org/mailman/listinfo/cloud >>>> >>>> >>>> _______________________________________________ >>>> Wikimedia Cloud Services mailing list >>>> Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) >>>> https://lists.wikimedia.org/mailman/listinfo/cloud >>> >>> _______________________________________________ >>> Wikimedia Cloud Services mailing list >>> Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) >>> https://lists.wikimedia.org/mailman/listinfo/cloud >> >> >> _______________________________________________ >> Wikimedia Cloud Services mailing list >> Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) >> https://lists.wikimedia.org/mailman/listinfo/cloud > > _______________________________________________ > Wikimedia Cloud Services mailing list > Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) > https://lists.wikimedia.org/mailman/listinfo/cloud
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