for the newton-proposed:
As our ldap server has a limit exceed setting, so I configured
```
[ldap]
page_size = 20000
```
before using the keystone in proposed repo, the keystone version is:
```
root@ubuntu:~# apt-cache policy keystone
keystone:
Installed: 2:10.0.3-0ubuntu1~cloud0
Candidate: 2:10.0.3-0ubuntu1~cloud1
Version table:
2:10.0.3-0ubuntu1~cloud1 500
500 http://ubuntu-cloud.archive.canonical.com/ubuntu
xenial-proposed/newton/main amd64 Packages
500 http://ubuntu-cloud.archive.canonical.com/ubuntu
xenial-proposed/newton/main i386 Packages
*** 2:10.0.3-0ubuntu1~cloud0 500
500 http://ubuntu-cloud.archive.canonical.com/ubuntu
xenial-updates/newton/main amd64 Packages
500 http://ubuntu-cloud.archive.canonical.com/ubuntu
xenial-updates/newton/main i386 Packages
100 /var/lib/dpkg/status
2:9.3.0-0ubuntu3.1 500
500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu xenial-security/main i386 Packages
2:9.0.0-0ubuntu1 500
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages
```
list users in ldap will take about 7-11 seconds:
```
root@ubuntu:~# time openstack user list --domain default
...
real 0m8.522s
user 0m1.476s
sys 0m0.108s
```
after using the package in proposed repo, it takes about 7-11 seconds:
```
root@ubuntu:~# time openstack user list --domain default
...
real 0m8.637s
user 0m1.484s
sys 0m0.108s
```
I execute above commands for several times, it seems that the patch
doesn't have a strong performance improvement
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https://bugs.launchpad.net/bugs/1582585
Title:
the speed of query user from ldap server is very slow
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