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Docker 1.9 serious performance issues #17720

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@vincentwoo

Description

A couple huge dealbreaking issues on 1.9 for me right now:

Docker ps on relatively modest number of containers is taking forever

coderpad@execute6:~$ time docker ps | wc -l
26

real    0m42.655s
user    0m0.016s
sys 0m0.004s

Container startup latency times have gone through the roof.

coderpad@execute6:~$ time docker run hub.coderpad.io/coderpad:base echo hello
hello

real    0m2.173s
user    0m0.020s
sys 0m0.000s
coderpad@execute6:~$ time docker run hub.coderpad.io/coderpad:base echo hello
hello

real    0m3.491s
user    0m0.020s
sys 0m0.000s

Env info:

coderpad@execute6:~$ docker version
Client:
 Version:      1.9.0
 API version:  1.21
 Go version:   go1.4.2
 Git commit:   76d6bc9
 Built:        Tue Nov  3 17:43:42 UTC 2015
 OS/Arch:      linux/amd64

Server:
 Version:      1.9.0
 API version:  1.21
 Go version:   go1.4.2
 Git commit:   76d6bc9
 Built:        Tue Nov  3 17:43:42 UTC 2015
 OS/Arch:      linux/amd64
coderpad@execute6:~$ docker info
Containers: 26
Images: 135
Server Version: 1.9.0
Storage Driver: overlay
 Backing Filesystem: extfs
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.19.0-31-generic
Operating System: Ubuntu 14.04.3 LTS
CPUs: 8
Total Memory: 31.38 GiB
Name: execute6
ID: 7TLS:YHFE:SJEE:D4YX:PFE3:CXO6:YWYM:TKCL:A6JQ:FBVJ:DUWE:B3OL

These boxes were running 1.8 in an identical configuration prior and doing fine

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priority/P1Important: P1 issues are a top priority and a must-have for the next release.

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