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Reduce orm overhead by grouping object expiration (#41394)

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This commit is contained in:
J. Nick Koston 2020-10-07 08:35:48 -05:00 committed by GitHub
parent 0dabf4962e
commit 113d738fa2
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2 changed files with 31 additions and 13 deletions
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36
homeassistant/components/recorder/__init__.py
View File

@ -58,8 +58,13 @@ DEFAULT_DB_FILE = "home-assistant_v2.db"
DEFAULT_DB_INTEGRITY_CHECK = True
DEFAULT_DB_MAX_RETRIES = 10
DEFAULT_DB_RETRY_WAIT = 3
DEFAULT_COMMIT_INTERVAL = 1
KEEPALIVE_TIME = 30
# Controls how often we clean up
# States and Events objects
EXPIRE_AFTER_COMMITS = 120
CONF_AUTO_PURGE = "auto_purge"
CONF_DB_URL = "db_url"
CONF_DB_MAX_RETRIES = "db_max_retries"
@ -91,9 +96,9 @@ CONFIG_SCHEMA = vol.Schema(
vol.Coerce(int), vol.Range(min=0)
),
vol.Optional(CONF_DB_URL): cv.string,
vol.Optional(CONF_COMMIT_INTERVAL, default=1): vol.All(
vol.Coerce(int), vol.Range(min=0)
),
vol.Optional(
CONF_COMMIT_INTERVAL, default=DEFAULT_COMMIT_INTERVAL
): vol.All(vol.Coerce(int), vol.Range(min=0)),
vol.Optional(
CONF_DB_MAX_RETRIES, default=DEFAULT_DB_MAX_RETRIES
): cv.positive_int,
@ -238,6 +243,7 @@ class Recorder(threading.Thread):
self.exclude_t = exclude_t
self._timechanges_seen = 0
self._commits_without_expire = 0
self._keepalive_count = 0
self._old_states = {}
self._pending_expunge = []
@ -345,6 +351,7 @@ class Recorder(threading.Thread):
)
self.event_session = self.get_session()
self.event_session.expire_on_commit = False
# Use a session for the event read loop
# with a commit every time the event time
# has changed. This reduces the disk io.
@ -485,24 +492,35 @@ class Recorder(threading.Thread):
try:
self.event_session = self.get_session()
self.event_session.expire_on_commit = False
except Exception as err: # pylint: disable=broad-except
# Must catch the exception to prevent the loop from collapsing
_LOGGER.exception("Error while creating new event session: %s", err)
def _commit_event_session(self):
self._commits_without_expire += 1
try:
self.event_session.flush()
for dbstate in self._pending_expunge:
# Expunge the state so its not expired
# until we use it later for dbstate.old_state
self.event_session.expunge(dbstate)
self._pending_expunge = []
if self._pending_expunge:
self.event_session.flush()
for dbstate in self._pending_expunge:
# Expunge the state so its not expired
# until we use it later for dbstate.old_state
self.event_session.expunge(dbstate)
self._pending_expunge = []
self.event_session.commit()
except Exception as err:
_LOGGER.error("Error executing query: %s", err)
self.event_session.rollback()
raise
# Expire is an expensive operation (frequently more expensive
# than the flush and commit itself) so we only
# do it after EXPIRE_AFTER_COMMITS commits
if self._commits_without_expire == EXPIRE_AFTER_COMMITS:
self._commits_without_expire = 0
self.event_session.expire_all()
@callback
def event_listener(self, event):
"""Listen for new events and put them in the process queue."""

8
tests/components/recorder/common.py
View File

@ -1,12 +1,12 @@
"""Common test utils for working with recorder."""
from datetime import timedelta
from homeassistant.components import recorder
from homeassistant.util import dt as dt_util
from tests.common import fire_time_changed
DB_COMMIT_INTERVAL = 50
def wait_recording_done(hass):
"""Block till recording is done."""
@ -18,6 +18,6 @@ def wait_recording_done(hass):
def trigger_db_commit(hass):
"""Force the recorder to commit."""
for _ in range(DB_COMMIT_INTERVAL):
for _ in range(recorder.DEFAULT_COMMIT_INTERVAL):
# We only commit on time change
fire_time_changed(hass, dt_util.utcnow())
fire_time_changed(hass, dt_util.utcnow() + timedelta(seconds=1))