*** This bug is a duplicate of bug 1332440 ***
https://bugs.launchpad.net/bugs/1332440
** Changed in: apt (Ubuntu)
Status: New => Invalid
** Also affects: apt (Ubuntu Trusty)
Importance: Undecided
Status: New
** This bug has been marked a duplicate of bug 1332440
apt-get update very slow when ulimit -n is big
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https://bugs.launchpad.net/bugs/1759440
Title:
Docker trusty image is very slow
Status in cloud-images:
New
Status in apt package in Ubuntu:
Invalid
Status in apt source package in Trusty:
New
Bug description:
I have strange slowness using the trusty image. I see no such slowness
with the Artful image.
I expect there is something wrong with my system/configuration, but
I'm at a loss to explain what is going on.
The difference appears to be IO related:
root@gisli:~# docker run -it ubuntu:trusty /bin/bash
root@5e4f73d56fa7:/# time apt-cache search iorate
real 0m8.666s
user 0m0.710s
sys 0m7.957s
root@5e4f73d56fa7:/# exit
root@gisli:~# docker run -it ubuntu:artful /bin/bash
root@5da05fb579d5:/# time apt-cache search iorate
real 0m0.049s
user 0m0.029s
sys 0m0.020s
Basic things feel very sluggish in it. apt-get update, installing
packages, etc.
However dd output looks fine:
root@gisli:~# docker run -it ubuntu:trusty /bin/bash
root@87749c754dc9:/# dd if=/dev/zero of=tempfile bs=1M count=1024
conv=fdatasync,notrunc
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.43277 s, 749 MB/s
root@gisli:~# docker run -it ubuntu:artful /bin/bash
root@7ab8fa9cd28a:/# dd if=/dev/zero of=tempfile bs=1M count=1024
conv=fdatasync,notrunc status=progress
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.37745 s, 780 MB/s
As do things like transferring data to the image via nc, running
sha256sum on large files. I haven't been able to pin down what the
problem is.
This is running on an Ubuntu Artful host using Docker 18.03.0-ce.
root@gisli:~# docker pull ubuntu:trusty
trusty: Pulling from library/ubuntu
Digest:
sha256:ed49036f63459d6e5ed6c0f238f5e94c3a0c70d24727c793c48fded60f70aa96
Status: Image is up to date for ubuntu:trusty
Is there anything I could try? Or should this be expected?
Thank you!
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