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28 commits

Author SHA1 Message Date
Aliaksandr Valialkin
8815080030
app/vmselect/promql: add the ability to copy all the labels from one side of group_left()/group_right() operation 
This is performed by specifying `*` inside group_left()/group_right().
Also allow specifying prefix for the copied labels via `group_left(...) prefix "..."` and `group_right(...) prefix "..."` syntax.
For example, the following query adds all the namespace-related labels to pod info, and prefixes all the copied label names with "ns_" prefix:

  kube_pod_info * on(namespace) group_left(*) prefix "ns_" kube_namespace_labels

This resolves the following StackOverflow questions:

- https://stackoverflow.com/questions/76661818/how-to-add-namespace-labels-to-pod-labels-in-prometheus
- https://stackoverflow.com/questions/76653997/how-can-i-make-a-new-copy-of-kube-namespace-labels-metric-with-a-different-name
 2023-07-17 19:07:39 -07:00
Zakhar Bessarab
6a5d236245
lib/storage: log original labels set when label value is truncated (#3952) 
lib/storage: log original labels set when label value is truncated
 2023-03-14 10:59:40 +01:00
Aliaksandr Valialkin
2f3ddd4884
app/vmselect/promql: avoid memory allocations and copying from source timeseries to the returned result at timeseriesToResult() 2023-01-09 22:38:59 -08:00
Aliaksandr Valialkin
0ad3bbadd3
lib/regexutil: add Simplify() function for simplifying the regular expression 2022-08-26 11:57:12 +03:00
Aliaksandr Valialkin
a350d1e81c
lib/storage: return marshaled metric names from SearchMetricNames 
Previously SearchMetricNames was returning unmarshaled metric names.
This wasn't great for vmstorage, which should spend additional CPU time
for marshaling the metric names before sending them to vmselect.

While at it, remove possible duplicate metric names, which could occur when
multiple samples for new time series are ingested via concurrent requests.

Also sort the metric names before returning them to the client.
This simplifies debugging of the returned metric names across repeated requests to /api/v1/series
 2022-06-28 18:17:15 +03:00
Aliaksandr Valialkin
7e99bbb967
lib/storage: document why job-like and instance-like labels must be stored at mn.Tags[0] and mn.Tags[1] 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2244
 2022-02-25 13:21:07 +02:00
Aliaksandr Valialkin
4bdd10ab90
lib/bytesutil: split Resize* funcs to MayOverallocate and NoOverallocate for more fine-grained control over memory allocations 
Follow-up for f4989edd96

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
 2022-02-01 00:18:42 +02:00
Aliaksandr Valialkin
f4989edd96
lib/bytesutil: split Resize() into ResizeNoCopy() and ResizeWithCopy() functions 
Previously bytesutil.Resize() was copying the original byte slice contents to a newly allocated slice.
This wasted CPU cycles and memory bandwidth in some places, where the original slice contents wasn't needed
after slize resizing. Switch such places to bytesutil.ResizeNoCopy().

Rename the original bytesutil.Resize() function to bytesutil.ResizeWithCopy() for the sake of improved readability.

Additionally, allocate new slice with `make()` instead of `append()`. This guarantees that the capacity of the allocated slice
exactly matches the requested size. The `append()` could return a slice with bigger capacity as an optimization for further `append()` calls.
This could result in excess memory usage when the returned byte slice was cached (for instance, in lib/blockcache).

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
 2022-01-25 15:24:44 +02:00
Aliaksandr Valialkin
ce333f28d8
all: use logger.WithThrottler() where appropriate 2021-12-21 17:03:25 +02:00
Aliaksandr Valialkin
45d082bbe2
app/vminsert: add -maxLabelValueLen command-line flag 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1908
 2021-12-06 11:40:34 +02:00
Aliaksandr Valialkin
009e136d88 lib/storage: remove possible data race when logging dropped labels 2021-05-20 02:47:22 +03:00
Aliaksandr Valialkin
12d733dd5d app/vminsert: add support for data ingestion via other vminsert nodes 2021-05-08 19:52:57 +03:00
Aliaksandr Valialkin
76027093ca lib/storage: use WARNING instead of INFO level for logging dropped labels 2021-05-03 13:56:43 +03:00
Aliaksandr Valialkin
58d1e6eeea lib/storage: log dropped labels if the number of labels in a metric exceeds -maxLabelsPerTimeseries command-line flag value 
This should improve debuggability for this case.
 2021-05-01 09:27:55 +03:00
Aliaksandr Valialkin
31ec79eaf6 lib/storage: inline marshalTags function and remove the code for handling duplicate tags from here 
This is a follow-up commit after c8ea697db8
 2021-01-12 15:13:30 +02:00
Aliaksandr Valialkin
c8ea697db8 lib/storage: de-duplicate tags in MetricName.sortTags 
Leave only the last tag among tags with duplicate keys. This is needed for reliable addition of extra_labels
during data ingestion. See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1007 for details.
 2021-01-12 15:03:42 +02:00
Aliaksandr Valialkin
8a057e705a lib/storage: log metric name plus all its labels when the metric timestamp is outside the configured retention 
This should simplify debugging when the source of the metric with unexpected timestamp must be found.
 2020-11-25 14:41:37 +02:00
Aliaksandr Valialkin
78d2715d04 all: spelling fix: superflouos->superfluous. This is a follow-up for 0acdab3ab9 2020-11-24 12:42:22 +02:00
Aliaksandr Valialkin
d12c4914f0 lib/storage: properly handle the case when key="__name__" is passed to MetricName.AddTag* 2020-11-01 23:35:06 +02:00
Aliaksandr Valialkin
d5dddb0953 all: use %w instead of %s for wrapping errors in fmt.Errorf 
This will simplify examining the returned errors such as httpserver.ErrorWithStatusCode .
See https://blog.golang.org/go1.13-errors for details.
 2020-06-30 23:05:11 +03:00
Aliaksandr Valialkin
7532dbcdf5 app/vmselect/promql: properly override label values from group_left and group_right lists like Prometheus does 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/577
 2020-06-21 16:33:01 +03:00
Aliaksandr Valialkin
b542e50680 app/vminsert: export metrics for determining ingested rows with dropped or truncated labels 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/565
 2020-06-19 01:10:37 +03:00
Aliaksandr Valialkin
0686ac52c3 lib/{storage,mergeset}: merge tag->metricID rows into tag->metricIDs rows for common tag values 
This should improve lookup performance if the same `label=value` pair exists
in big number of time series.
This should also reduce memory usage for mergeset data cache, since `tag->metricIDs` rows
occupy less space than the original `tag->metricID` rows.
 2019-09-20 22:06:41 +03:00
Aliaksandr Valialkin
16dd145586 lib/storage: remove duplicate tag keys on MetricName.Marshal call 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/172
 2019-09-04 18:13:45 +03:00
Aliaksandr Valialkin
8c03a8c4b4 app/vminsert: allow setting the maximum number of labels per time series via -maxLabelsPerTimeseries 2019-08-23 08:45:26 +03:00
Aliaksandr Valialkin
d031e04023 lib/storage: use fast path for orSuffix when searching for metricIDs against plain tag value 2019-07-11 14:48:37 +03:00
Aliaksandr Valialkin
80db24386e lib/storage: typo fixes found by golangci-lint; updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/69 2019-06-20 14:37:55 +03:00
Aliaksandr Valialkin
1836c415e6 all: open-sourcing single-node version 2019-05-23 00:18:06 +03:00