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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 >> [email protected] (formerly [email protected]) >> https://lists.wikimedia.org/mailman/listinfo/cloud >> >> >> _______________________________________________ >> Wikimedia Cloud Services mailing list >> [email protected] (formerly [email protected]) >> https://lists.wikimedia.org/mailman/listinfo/cloud >> >> >> _______________________________________________ >> Wikimedia Cloud Services mailing list >> [email protected] (formerly [email protected]) >> https://lists.wikimedia.org/mailman/listinfo/cloud > > _______________________________________________ > Wikimedia Cloud Services mailing list > [email protected] (formerly [email protected]) > https://lists.wikimedia.org/mailman/listinfo/cloud _______________________________________________ Wikimedia Cloud Services mailing list [email protected] (formerly [email protected]) https://lists.wikimedia.org/mailman/listinfo/cloud
