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defer loading Job.artifacts on host views to improve performance

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see: https://github.com/ansible/awx/issues/8006

this data can be *really* large, and we don't actually need it for the summary fields on this API endpoint
This commit is contained in:
Ryan Petrello
2020-08-26 13:20:35 -04:00
parent 48f00587f8
commit 73baf3fcf9
2 changed files with 11 additions and 2 deletions
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5
awx/api/serializers.py
View File

@@ -1702,7 +1702,10 @@ class HostSerializer(BaseSerializerWithVariables):
'type': j.job.job_type_name, 'type': j.job.job_type_name,
'status': j.job.status, 'status': j.job.status,
'finished': j.job.finished, 'finished': j.job.finished,
} for j in obj.job_host_summaries.select_related('job__job_template').order_by('-created')[:5]]) } for j in obj.job_host_summaries.select_related('job__job_template').order_by('-created').defer(
'job__extra_vars',
'job__artifacts',
)[:5]])
return d return d
def _get_host_port_from_name(self, name): def _get_host_port_from_name(self, name):

8
awx/main/managers.py
View File

@@ -48,7 +48,13 @@ class HostManager(models.Manager):
"""When the parent instance of the host query set has a `kind=smart` and a `host_filter` """When the parent instance of the host query set has a `kind=smart` and a `host_filter`
set. Use the `host_filter` to generate the queryset for the hosts. set. Use the `host_filter` to generate the queryset for the hosts.
""" """
qs = super(HostManager, self).get_queryset() qs = super(HostManager, self).get_queryset().defer(
'last_job__extra_vars',
'last_job_host_summary__job__extra_vars',
'last_job__artifacts',
'last_job_host_summary__job__artifacts',
)
if (hasattr(self, 'instance') and if (hasattr(self, 'instance') and
hasattr(self.instance, 'host_filter') and hasattr(self.instance, 'host_filter') and
hasattr(self.instance, 'kind')): hasattr(self.instance, 'kind')):