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Add a new version of the R30 phone-home metric, which removes a false impression of retention given by the old R30 metric (#10332) 

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>
This commit is contained in:
reivilibre 2021-07-19 16:11:34 +01:00 committed by GitHub
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commit 4e340412c0
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6 changed files with 416 additions and 5 deletions
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1
changelog.d/10332.feature Normal file
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@ -0,0 +1 @@
Add a new version of the R30 phone-home metric, which removes a false impression of retention given by the old R30 metric.

4
synapse/app/phone_stats_home.py
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@ -107,6 +107,10 @@ async def phone_stats_home(hs, stats, stats_process=_stats_process):
for name, count in r30_results.items():
stats["r30_users_" + name] = count
r30v2_results = await hs.get_datastore().count_r30_users()
for name, count in r30v2_results.items():
stats["r30v2_users_" + name] = count
stats["cache_factor"] = hs.config.caches.global_factor
stats["event_cache_size"] = hs.config.caches.event_cache_size

129
synapse/storage/databases/main/metrics.py
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@ -316,6 +316,135 @@ class ServerMetricsStore(EventPushActionsWorkerStore, SQLBaseStore):
return await self.db_pool.runInteraction("count_r30_users", _count_r30_users)
async def count_r30v2_users(self) -> Dict[str, int]:
"""
Counts the number of 30 day retained users, defined as users that:
- Appear more than once in the past 60 days
- Have more than 30 days between the most and least recent appearances that
occurred in the past 60 days.
(This is the second version of this metric, hence R30'v2')
Returns:
A mapping from client type to the number of 30-day retained users for that client.
The dict keys are:
- "all" (a combined number of users across any and all clients)
- "android" (Element Android)
- "ios" (Element iOS)
- "electron" (Element Desktop)
- "web" (any web application -- it's not possible to distinguish Element Web here)
"""
def _count_r30v2_users(txn):
thirty_days_in_secs = 86400 * 30
now = int(self._clock.time())
sixty_days_ago_in_secs = now - 2 * thirty_days_in_secs
one_day_from_now_in_secs = now + 86400
# This is the 'per-platform' count.
sql = """
SELECT
client_type,
count(client_type)
FROM
(
SELECT
user_id,
CASE
WHEN
LOWER(user_agent) LIKE '%%riot%%' OR
LOWER(user_agent) LIKE '%%element%%'
THEN CASE
WHEN
LOWER(user_agent) LIKE '%%electron%%'
THEN 'electron'
WHEN
LOWER(user_agent) LIKE '%%android%%'
THEN 'android'
WHEN
LOWER(user_agent) LIKE '%%ios%%'
THEN 'ios'
ELSE 'unknown'
END
WHEN
LOWER(user_agent) LIKE '%%mozilla%%' OR
LOWER(user_agent) LIKE '%%gecko%%'
THEN 'web'
ELSE 'unknown'
END as client_type
FROM
user_daily_visits
WHERE
timestamp > ?
AND
timestamp < ?
GROUP BY
user_id,
client_type
HAVING
max(timestamp) - min(timestamp) > ?
) AS temp
GROUP BY
client_type
;
"""
# We initialise all the client types to zero, so we get an explicit
# zero if they don't appear in the query results
results = {"ios": 0, "android": 0, "web": 0, "electron": 0}
txn.execute(
sql,
(
sixty_days_ago_in_secs * 1000,
one_day_from_now_in_secs * 1000,
thirty_days_in_secs * 1000,
),
)
for row in txn:
if row[0] == "unknown":
continue
results[row[0]] = row[1]
# This is the 'all users' count.
sql = """
SELECT COUNT(*) FROM (
SELECT
1
FROM
user_daily_visits
WHERE
timestamp > ?
AND
timestamp < ?
GROUP BY
user_id
HAVING
max(timestamp) - min(timestamp) > ?
) AS r30_users
"""
txn.execute(
sql,
(
sixty_days_ago_in_secs * 1000,
one_day_from_now_in_secs * 1000,
thirty_days_in_secs * 1000,
),
)
row = txn.fetchone()
if row is None:
results["all"] = 0
else:
results["all"] = row[0]
return results
return await self.db_pool.runInteraction(
"count_r30v2_users", _count_r30v2_users
)
def _get_start_of_day(self):
"""
Returns millisecond unixtime for start of UTC day.

242
tests/app/test_phone_stats_home.py
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@ -1,9 +1,11 @@
import synapse
from synapse.app.phone_stats_home import start_phone_stats_home
from synapse.rest.client.v1 import login, room
from tests import unittest
from tests.unittest import HomeserverTestCase
FIVE_MINUTES_IN_SECONDS = 300
ONE_DAY_IN_SECONDS = 86400
@ -151,3 +153,243 @@ class PhoneHomeTestCase(HomeserverTestCase):
# *Now* the user appears in R30.
r30_results = self.get_success(self.hs.get_datastore().count_r30_users())
self.assertEqual(r30_results, {"all": 1, "unknown": 1})
class PhoneHomeR30V2TestCase(HomeserverTestCase):
servlets = [
synapse.rest.admin.register_servlets_for_client_rest_resource,
room.register_servlets,
login.register_servlets,
]
def _advance_to(self, desired_time_secs: float):
now = self.hs.get_clock().time()
assert now < desired_time_secs
self.reactor.advance(desired_time_secs - now)
def make_homeserver(self, reactor, clock):
hs = super(PhoneHomeR30V2TestCase, self).make_homeserver(reactor, clock)
# We don't want our tests to actually report statistics, so check
# that it's not enabled
assert not hs.config.report_stats
# This starts the needed data collection that we rely on to calculate
# R30v2 metrics.
start_phone_stats_home(hs)
return hs
def test_r30v2_minimum_usage(self):
"""
Tests the minimum amount of interaction necessary for the R30v2 metric
to consider a user 'retained'.
"""
# Register a user, log it in, create a room and send a message
user_id = self.register_user("u1", "secret!")
access_token = self.login("u1", "secret!")
room_id = self.helper.create_room_as(room_creator=user_id, tok=access_token)
self.helper.send(room_id, "message", tok=access_token)
first_post_at = self.hs.get_clock().time()
# Give time for user_daily_visits table to be updated.
# (user_daily_visits is updated every 5 minutes using a looping call.)
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
store = self.hs.get_datastore()
# Check the R30 results do not count that user.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# Advance 31 days.
# (R30v2 includes users with **more** than 30 days between the two visits,
# and user_daily_visits records the timestamp as the start of the day.)
self.reactor.advance(31 * ONE_DAY_IN_SECONDS)
# Also advance 5 minutes to let another user_daily_visits update occur
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
# (Make sure the user isn't somehow counted by this point.)
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# Send a message (this counts as activity)
self.helper.send(room_id, "message2", tok=access_token)
# We have to wait a few minutes for the user_daily_visits table to
# be updated by a background process.
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
# *Now* the user is counted.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 1, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# Advance to JUST under 60 days after the user's first post
self._advance_to(first_post_at + 60 * ONE_DAY_IN_SECONDS - 5)
# Check the user is still counted.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 1, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# Advance into the next day. The user's first activity is now more than 60 days old.
self._advance_to(first_post_at + 60 * ONE_DAY_IN_SECONDS + 5)
# Check the user is now no longer counted in R30.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
def test_r30v2_user_must_be_retained_for_at_least_a_month(self):
"""
Tests that a newly-registered user must be retained for a whole month
before appearing in the R30v2 statistic, even if they post every day
during that time!
"""
# set a custom user-agent to impersonate Element/Android.
headers = (
(
"User-Agent",
"Element/1.1 (Linux; U; Android 9; MatrixAndroidSDK_X 0.0.1)",
),
)
# Register a user and send a message
user_id = self.register_user("u1", "secret!")
access_token = self.login("u1", "secret!", custom_headers=headers)
room_id = self.helper.create_room_as(
room_creator=user_id, tok=access_token, custom_headers=headers
)
self.helper.send(room_id, "message", tok=access_token, custom_headers=headers)
# Give time for user_daily_visits table to be updated.
# (user_daily_visits is updated every 5 minutes using a looping call.)
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
store = self.hs.get_datastore()
# Check the user does not contribute to R30 yet.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
for _ in range(30):
# This loop posts a message every day for 30 days
self.reactor.advance(ONE_DAY_IN_SECONDS - FIVE_MINUTES_IN_SECONDS)
self.helper.send(
room_id, "I'm still here", tok=access_token, custom_headers=headers
)
# give time for user_daily_visits to update
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
# Notice that the user *still* does not contribute to R30!
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# advance yet another day with more activity
self.reactor.advance(ONE_DAY_IN_SECONDS)
self.helper.send(
room_id, "Still here!", tok=access_token, custom_headers=headers
)
# give time for user_daily_visits to update
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
# *Now* the user appears in R30.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 1, "android": 1, "electron": 0, "ios": 0, "web": 0}
)
def test_r30v2_returning_dormant_users_not_counted(self):
"""
Tests that dormant users (users inactive for a long time) do not
contribute to R30v2 when they return for just a single day.
This is a key difference between R30 and R30v2.
"""
# set a custom user-agent to impersonate Element/iOS.
headers = (
(
"User-Agent",
"Riot/1.4 (iPhone; iOS 13; Scale/4.00)",
),
)
# Register a user and send a message
user_id = self.register_user("u1", "secret!")
access_token = self.login("u1", "secret!", custom_headers=headers)
room_id = self.helper.create_room_as(
room_creator=user_id, tok=access_token, custom_headers=headers
)
self.helper.send(room_id, "message", tok=access_token, custom_headers=headers)
# the user goes inactive for 2 months
self.reactor.advance(60 * ONE_DAY_IN_SECONDS)
# the user returns for one day, perhaps just to check out a new feature
self.helper.send(room_id, "message", tok=access_token, custom_headers=headers)
# Give time for user_daily_visits table to be updated.
# (user_daily_visits is updated every 5 minutes using a looping call.)
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
store = self.hs.get_datastore()
# Check that the user does not contribute to R30v2, even though it's been
# more than 30 days since registration.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)
# Check that this is a situation where old R30 differs:
# old R30 DOES count this as 'retained'.
r30_results = self.get_success(store.count_r30_users())
self.assertEqual(r30_results, {"all": 1, "ios": 1})
# Now we want to check that the user will still be able to appear in
# R30v2 as long as the user performs some other activity between
# 30 and 60 days later.
self.reactor.advance(32 * ONE_DAY_IN_SECONDS)
self.helper.send(room_id, "message", tok=access_token, custom_headers=headers)
# (give time for tables to update)
self.reactor.advance(FIVE_MINUTES_IN_SECONDS)
# Check the user now satisfies the requirements to appear in R30v2.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 1, "ios": 1, "android": 0, "electron": 0, "web": 0}
)
# Advance to 59.5 days after the user's first R30v2-eligible activity.
self.reactor.advance(27.5 * ONE_DAY_IN_SECONDS)
# Check the user still appears in R30v2.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 1, "ios": 1, "android": 0, "electron": 0, "web": 0}
)
# Advance to 60.5 days after the user's first R30v2-eligible activity.
self.reactor.advance(ONE_DAY_IN_SECONDS)
# Check the user no longer appears in R30v2.
r30_results = self.get_success(store.count_r30v2_users())
self.assertEqual(
r30_results, {"all": 0, "android": 0, "electron": 0, "ios": 0, "web": 0}
)

30
tests/rest/client/v1/utils.py
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@ -19,7 +19,7 @@ import json
import re
import time
import urllib.parse
from typing import Any, Dict, Mapping, MutableMapping, Optional
from typing import Any, Dict, Iterable, Mapping, MutableMapping, Optional, Tuple, Union
from unittest.mock import patch
import attr
@ -53,6 +53,9 @@ class RestHelper:
tok: str = None,
expect_code: int = 200,
extra_content: Optional[Dict] = None,
custom_headers: Optional[
Iterable[Tuple[Union[bytes, str], Union[bytes, str]]]
] = None,
) -> str:
"""
Create a room.
@ -87,6 +90,7 @@ class RestHelper:
"POST",
path,
json.dumps(content).encode("utf8"),
custom_headers=custom_headers,
)
assert channel.result["code"] == b"%d" % expect_code, channel.result
@ -175,14 +179,30 @@ class RestHelper:
self.auth_user_id = temp_id
def send(self, room_id, body=None, txn_id=None, tok=None, expect_code=200):
def send(
self,
room_id,
body=None,
txn_id=None,
tok=None,
expect_code=200,
custom_headers: Optional[
Iterable[Tuple[Union[bytes, str], Union[bytes, str]]]
] = None,
):
if body is None:
body = "body_text_here"
content = {"msgtype": "m.text", "body": body}
return self.send_event(
room_id, "m.room.message", content, txn_id, tok, expect_code
room_id,
"m.room.message",
content,
txn_id,
tok,
expect_code,
custom_headers=custom_headers,
)
def send_event(
@ -193,6 +213,9 @@ class RestHelper:
txn_id=None,
tok=None,
expect_code=200,
custom_headers: Optional[
Iterable[Tuple[Union[bytes, str], Union[bytes, str]]]
] = None,
):
if txn_id is None:
txn_id = "m%s" % (str(time.time()))
@ -207,6 +230,7 @@ class RestHelper:
"PUT",
path,
json.dumps(content or {}).encode("utf8"),
custom_headers=custom_headers,
)
assert (

15
tests/unittest.py
View File

@ -594,7 +594,15 @@ class HomeserverTestCase(TestCase):
user_id = channel.json_body["user_id"]
return user_id
def login(self, username, password, device_id=None):
def login(
self,
username,
password,
device_id=None,
custom_headers: Optional[
Iterable[Tuple[Union[bytes, str], Union[bytes, str]]]
] = None,
):
"""
Log in a user, and get an access token. Requires the Login API be
registered.
@ -605,7 +613,10 @@ class HomeserverTestCase(TestCase):
body["device_id"] = device_id
channel = self.make_request(
"POST", "/_matrix/client/r0/login", json.dumps(body).encode("utf8")
"POST",
"/_matrix/client/r0/login",
json.dumps(body).encode("utf8"),
custom_headers=custom_headers,
)
self.assertEqual(channel.code, 200, channel.result)