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app/victoria-metrics: automatically reset response cache when samples with too timestamps older than now - search.cacheTimestampOffset are ingested

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Aliaksandr Valialkin 2020-12-14 13:08:22 +02:00
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docs/CHANGELOG.md
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@ -2,6 +2,7 @@
# tip # tip
* FEATURE: automatically reset response cache when samples with timestamps older than `now - search.cacheTimestampOffset` are ingested to VictoriaMetrics. This makes unnecessary disabling response cache during data backfilling or resetting it after backfilling is complete as described [in these docs](https://victoriametrics.github.io/#backfilling). This feature applies only to single-node VictoriaMetrics. It doesn't apply to cluster version of VictoriaMetrics because `vminsert` nodes don't know about `vmselect` nodes where the response cache must be reset.
* FEATURE: allow multiple whitespace chars between measurements, fields and timestamp when parsing InfluxDB line protocol. * FEATURE: allow multiple whitespace chars between measurements, fields and timestamp when parsing InfluxDB line protocol.
Though [InfluxDB line protocol](https://docs.influxdata.com/influxdb/v1.8/write_protocols/line_protocol_tutorial/) denies multiple whitespace chars between these entities, Though [InfluxDB line protocol](https://docs.influxdata.com/influxdb/v1.8/write_protocols/line_protocol_tutorial/) denies multiple whitespace chars between these entities,
some apps improperly put multiple whitespace chars. This workaround allows accepting data from such apps. some apps improperly put multiple whitespace chars. This workaround allows accepting data from such apps.

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docs/Single-server-VictoriaMetrics.md
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@ -1332,7 +1332,8 @@ An alternative solution is to query `/internal/resetRollupResultCache` url after
the query cache, which could contain incomplete data cached during the backfilling. the query cache, which could contain incomplete data cached during the backfilling.
Yet another solution is to increase `-search.cacheTimestampOffset` flag value in order to disable caching Yet another solution is to increase `-search.cacheTimestampOffset` flag value in order to disable caching
for data with timestamps close to the current time. for data with timestamps close to the current time. Single-node VictoriaMetrics automatically resets response
cache when samples with timestamps older than `now - search.cacheTimestampOffset` are ingested to it.
## Data updates ## Data updates