index unified_job.status

this is a fairly importantj column that we join on for a number of
queries throughout AWX, particularly the task scheduler and analytics

awx/main/migrations/0065_v350_index_job_status.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2019-03-29 16:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0064_v350_analytics_state'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='unifiedjob',
+            name='status',
+            field=models.CharField(choices=[('new', 'New'), ('pending', 'Pending'), ('waiting', 'Waiting'), ('running', 'Running'), ('successful', 'Successful'), ('failed', 'Failed'), ('error', 'Error'), ('canceled', 'Canceled')], db_index=True, default='new', editable=False, max_length=20),
+        ),
+    ]

awx/main/models/unified_jobs.py

@@ -618,6 +618,7 @@ class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique
         choices=STATUS_CHOICES,
         default='new',
         editable=False,
+        db_index=True,
     )
     failed = models.BooleanField(
         default=False,