* Prebake common history queries
The python overhead of to construct
the queries exceeded the database overhead. We now
prebake the queries that get frequently polled.
This reduces the time it takes to update history_stats
sensors and can make quite a difference if there
are a lot of them.
When using the mini-graph-card card, all the entities
on the card being graphed are queried every few seconds
for new states. Previously this would tie up the database if there
are lot of these graphs in the UI.
* Update homeassistant/components/history/__init__.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Update homeassistant/components/history/__init__.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* cache entity_filter in the lambda
* switch to yield
* Revert "switch to yield"
This reverts commit f8386f4940.
* get_states always returns a list
* query wasnt actually reusable so revert part of the breakout
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Improve history api performance
A new option "minimal_response" reduces the amount of data
sent between the first and last history states to only the
"last_changed" and "state" fields.
Calling to_native is now avoided where possible and only
done at the end for rows that will be returned in the response.
When sending the `minimal_response` option, the history
api now returns a json response similar to the following
for an entity
Testing:
History API Response time for 1 day
Average of 10 runs with minimal_response
Before: 19.89s. (content length : 3427428)
After: 8.44s (content length: 592199)
```
[{
"attributes": {--TRUNCATED--},
"context": {--TRUNCATED--},
"entity_id": "binary_sensor.powerwall_status",
"last_changed": "2020-05-18T23:20:03.213000+00:00",
"last_updated": "2020-05-18T23:20:03.213000+00:00",
"state": "on"
},
...
{
"last_changed": "2020-05-19T00:41:08Z",
"state": "unavailable"
},
...
{
"attributes": {--TRUNCATED--},
"context": {--TRUNCATED--},
"entity_id": "binary_sensor.powerwall_status",
"last_changed": "2020-05-19T00:42:08.069698+00:00",
"last_updated": "2020-05-19T00:42:08.069698+00:00",
"state": "on"
}]
```
* Remove impossible state check
* Remove another impossible state check
* Update homeassistant/components/history/__init__.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Reorder to save some indent per review
* Make query response make sense with to_native=False
* Update test for 00:00 to Z change
* Update homeassistant/components/recorder/models.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Avoid a context switch in the history api
The history api was creating a job to fetch the
states and another job to convert the states to
json. This can be done in a single job which
decreases the overhead of the operation.
* Ensure there is only one sqlalchemy session created per history
query.
Most queries created three sqlalchemy sessions which was
especially slow with sqlite since it opens and closes the
database.
In testing the UI is noticeably faster at generating history
graphs for entites.
* Add additional coverage
* pass hass first to _states_to_json and _get_significant_states
* Add include_location_attributes
* Add check for different state
* Fix things
* Drop filter
* significant changes only
* Change default behavior
* Remove trailing commas
* Add a commit interval setting to recorder
* Make the default every 1s instead of immediate
* See attached py-spy flamegraphs for why 1s
* This avoids disk thrashing during event storms
* Make Home Assistant significantly more responsive on busy systems
* remove debug
* Add commit forces for tests that expect commits to be immediate
* Add commit forces for tests that expect commits to be immediate
* make sure _trigger_db_commit is in the right place (all effective "wait_recording_done" calls)
* De-duplicate wait_recording_done code
Franck Nijhof
J. Nick Koston
Paulus Schoutsen
Santobert
J. Nick Koston
Bas Nijholt
Thomas Lovén
Paulus Schoutsen