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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