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faster /stats, no more count(*)

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This commit is contained in:
cquest 2016-06-05 20:24:47 +02:00
parent 107a2ce3b1
commit 49ff0a1832
1 changed files with 6 additions and 4 deletions
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10
backend.py
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@ -45,12 +45,14 @@ class StatsResource(object):
def on_get(self, req, resp):
db = db_connect()
cur = db.cursor(cursor_factory=psycopg2.extras.DictCursor)
cur.execute("SELECT count(*) as events_count, max(createdate) as last_created, max(lastupdate) as last_updated from events;")
stat = cur.fetchone()
# estimated row count, way faster then count(*)
cur.execute("SELECT reltuples FROM pg_class r WHERE relname = 'events';")
count = cur.fetchone()[0]
cur.execute("SELECT max(lastupdate) as last_updated from events;")
last = cur.fetchone()[0]
cur.close()
db.close()
resp.body = dumps(dict(stat))
resp.body = dumps(dict(events_count=count, last_updated=last))
resp.status = falcon.HTTP_200