ansible/changelogs/fragments/63551-yum-single-YumBase-instantiation.yaml
Adam Miller 8c43697e3b yum - only instantiate YumBase once (#63713)
* yum - only instantiate YumBase once

Previously, this code was re-instantiating the `YumBase` object
many times which is unnecessary and slow. However, we must do it
twice in the `state: absent` case because the `yumSack` and
`rpmSack` data of the previously instantiated object becomes
invalid and is no longer useful post transaction when we verify
that the package removal did in fact take place. Also, this patch
removes the repetitive re-processing of enable/disable of repos in
various places.

Here's a display of the speed increase against a RHEL7 host:

```yaml
- hosts: rhel7
  remote_user: root
  tasks:
  - name: Install generic packages
    yum:
      state: present
      name:
        - iptraf-ng
        - screen
        - erlang
  - name: Remove generic packages
    yum:
      state: absent
      name:
        - iptraf-ng
        - screen
        - erlang
```

Before this patch:
```
real    0m52.728s
user    0m5.645s
sys     0m0.482s
```

After this patch:
```
real    0m17.139s
user    0m3.238s
sys     0m0.277s
```

Fixes #63588
Fixes #63551

Signed-off-by: Adam Miller <admiller@redhat.com>

* add changelog

Signed-off-by: Adam Miller <admiller@redhat.com>
2019-10-23 03:34:13 -04:00

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YAML

bugfixes:
- yum - performance bugfix, the YumBase object was being instantiated
multiple times unnecessarily, which lead to considerable overhead when
operating against large sets of packages.