mirror of
https://github.com/carrotquest/django-clickhouse.git
synced 2024-11-30 21:13:44 +03:00
56 lines
2.9 KiB
Markdown
56 lines
2.9 KiB
Markdown
# Monitoring
|
|
In order to monitor [synchronization](synchronization.md) process, [statsd](https://pypi.org/project/statsd/) is used.
|
|
Data from statsd then can be used by [Prometheus exporter](https://github.com/prometheus/statsd_exporter)
|
|
or [Graphite](https://graphite.readthedocs.io/en/latest/).
|
|
|
|
## Configuration
|
|
Library expects statsd to be configured as written in [statsd docs for django](https://statsd.readthedocs.io/en/latest/configure.html#in-django).
|
|
You can set a common prefix for all keys in this library using [CLICKHOUSE_STATSD_PREFIX](configuration.md#clickhouse_statsd_prefix) parameter.
|
|
|
|
## Exported metrics
|
|
## Gauges
|
|
* `<prefix>.sync.<model_name>.queue`
|
|
Number of elements in [intermediate storage](storages.md) queue waiting for import.
|
|
Queue should not be big. It depends on [sync_delay](synchronization.md#configuration) configured and time for syncing single batch.
|
|
It is a good parameter to watch and alert on.
|
|
|
|
## Timers
|
|
All time is sent in milliseconds.
|
|
|
|
* `<prefix>.sync.<model_name>.total`
|
|
Total time of single batch task execution.
|
|
|
|
* `<prefix>.sync.<model_name>.steps.<step_name>`
|
|
`<step_name>` is one of `pre_sync`, `get_operations`, `get_sync_objects`, `get_insert_batch`, `get_final_versions`,
|
|
`insert`, `post_sync`. Read [here](synchronization.md) for more details.
|
|
Time of each sync step. Can be useful to debug reasons of long sync process.
|
|
|
|
* `<prefix>.inserted_tuples.<model_name>`
|
|
Time of inserting batch of data into ClickHouse.
|
|
It excludes as much python code as it could to distinguish real INSERT time from python data preparation.
|
|
|
|
* `<prefix>.sync.<model_name>.register_operations`
|
|
Time of inserting sync operations into storage.
|
|
|
|
## Counters
|
|
* `<prefix>.sync.<model_name>.register_operations.<op_name>`
|
|
`<op_name>` is one or `create`, `update`, `delete`.
|
|
Number of DML operations added by DjangoModel methods calls to sync queue.
|
|
|
|
* `<prefix>.sync.<model_name>.operations`
|
|
Number of operations, fetched from [storage](storages.md) for sync in one batch.
|
|
|
|
* `<prefix>.sync.<model_name>.import_objects`
|
|
Number of objects, fetched from relational storage (based on operations) in order to sync with ClickHouse models.
|
|
|
|
* `<prefix>.inserted_tuples.<model_name>`
|
|
Number of rows inserted to ClickHouse.
|
|
|
|
* `<prefix>.sync.<model_name>.lock.timeout`
|
|
Number of locks in [RedisStorage](storages.md#redisstorage), not acquired and skipped by timeout.
|
|
This value should be zero. If not, it means your model sync takes longer then sync task call interval.
|
|
|
|
* `<prefix>.sync.<model_name>.lock.hard_release`
|
|
Number of locks in [RedisStorage](storages.md#redisstorage), released hardly (as process which required a lock is dead).
|
|
This value should be zero. If not, it means your sync tasks are killed hardly during the sync process (by OutOfMemory killer, for instance).
|