VictoriaMetrics/CHANGELOG.md

CHANGELOG

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v1.46.0

• FEATURE: optimize requests to /api/v1/labels and /api/v1/label/<name>/values when start and end args are set.

• FEATURE: reduce memory usage when query touches big number of time series.

• FEATURE: vmagent: reduce memory usage when kubernetes_sd_config discovers big number of scrape targets (e.g. hundreds of thouthands) and the majority of these targets (99%) are dropped during relabeling. Previously labels for all the dropped targets were displayed at /api/v1/targets page. Now only up to -promscrape.maxDroppedTargets such targets are displayed. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/878 for details.

• FEATURE: vmagent: reduce memory usage when scraping big number of targets with big number of temporary labels starting with __. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/825

• FEATURE: vmagent: add /ready HTTP endpoint, which returns 200 OK status code when all the service discovery has been initialized. This may be useful during rolling upgrades. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/875

• BUGFIX: vmagent: eliminate data race when -promscrape.streamParse command-line is set. Previously this mode could result in scraped metrics with garbage labels. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/825#issuecomment-723198247 for details.

• BUGFIX: properly calculate topk_* and bottomk_* functions from MetricsQL for time series with gaps. See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/883

v1.45.0

• FEATURE: allow setting -retentionPeriod smaller than one month. I.e. -retentionPeriod=3d, -retentionPeriod=2w, etc. is supported now. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/173

• FEATURE: optimize more cases according to https://utcc.utoronto.ca/~cks/space/blog/sysadmin/PrometheusLabelNonOptimization . Now the following cases are optimized too:

  • rollup_func(foo{filters}[d]) op bar -> rollup_func(foo{filters}[d]) op bar{filters}
  • transform_func(foo{filters}) op bar -> transform_func(foo{filters}) op bar{filters}
  • num_or_scalar op foo{filters} op bar -> num_or_scalar op foo{filters} op bar{filters}

• FEATURE: improve time series search for queries with multiple label filters. I.e. foo{label1="value", label2=~"regexp"}. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/781

• FEATURE: vmagent: add stream parse mode. This mode allows reducing memory usage when individual scrape targets expose tens of millions of metrics. For example, during scraping Prometheus in federation mode. See -promscrape.streamParse command-line option and stream_parse: true config option for scrape_config section in -promscrape.config. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/825 and troubleshooting docs for vmagent.

• FEATURE: vmalert: add -dryRun command-line option for validating the provided config files without the need to start vmalert service.

• FEATURE: accept optional third argument of string type at topk_* and bottomk_* functions. This is label name for additional time series to return with the sum of time series outside top/bottom K. See MetricsQL docs for more details.

• FEATURE: vmagent: expose /api/v1/targets page according to the corresponding Prometheus API. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/643

• BUGFIX: vmagent: properly handle OpenStack endpoint ending with v3.0 such as https://ostack.example.com:5000/v3.0 in the same way as Prometheus does. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/728#issuecomment-709914803

• BUGFIX: drop trailing data points for time series with a single raw sample. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748

• BUGFIX: do not drop trailing data points for instant queries to /api/v1/query. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/845

• BUGFIX: vmbackup: fix panic when -origin isn't specified. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/856

• BUGFIX: vmalert: skip automatically added labels on alerts restore. Label alertgroup was introduced in this issue and automatically added to generated time series. By mistake, this new label wasn't correctly purged on restore event and affected alert's ID uniqueness. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/870

• BUGFIX: vmagent: fix panic at scrape error body formating. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/864

• BUGFIX: vmagent: add leading missing slash to metrics path like Prometheus does. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/835

• BUGFIX: vmagent: drop packet if remote storage returns 4xx status code. This make the behaviour consistent with Prometheus. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/873

• BUGFIX: vmagent: properly handle 301 redirects. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/869

v1.44.0

• FEATURE: automatically add missing label filters to binary operands as described at https://utcc.utoronto.ca/~cks/space/blog/sysadmin/PrometheusLabelNonOptimization . This should improve performance for queries with missing label filters in binary operands. For example, the following query should work faster now, because it shouldn't fetch and discard time series for node_filesystem_files_free metric without matching labels for the left side of the expression:

     node_filesystem_files{ host="$host", mountpoint="/" } - node_filesystem_files_free
  

• FEATURE: vmagent: add Docker Swarm service discovery (aka dockerswarm_sd_config). See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/656

• FEATURE: add ability to export data in CSV format. See these docs for details.

• FEATURE: vmagent: add -promscrape.suppressDuplicateScrapeTargetErrors command-line flag for suppressing duplicate scrape target errors. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/651 and https://victoriametrics.github.io/vmagent.html#troubleshooting .

• FEATURE: vmagent: show original labels before relabeling is applied on duplicate scrape target errors. This should simplify debugging for incorrect relabeling. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/651

• FEATURE: vmagent: /targets page now accepts optional show_original_labels=1 query arg for displaying original labels for each target before relabeling is applied. This should simplify debugging for target relabeling configs. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/651

• FEATURE: add -finalMergeDelay command-line flag for configuring the delay before final merge for per-month partitions. The final merge is started after no new data is ingested into per-month partition during -finalMergeDelay.

• FEATURE: add vm_rows_added_to_storage_total metric, which shows the total number of rows added to storage since app start. The sum(rate(vm_rows_added_to_storage_total)) can be smaller than sum(rate(vm_rows_inserted_total)) if certain metrics are dropped due to relabeling. The sum(rate(vm_rows_added_to_storage_total)) can be bigger than sum(rate(vm_rows_inserted_total)) if replication is enabled.

• FEATURE: keep metric name after applying MetricsQL functions, which don't change time series meaning. The list of such functions:

  • keep_last_value
  • keep_next_value
  • interpolate
  • running_min
  • running_max
  • running_avg
  • range_min
  • range_max
  • range_avg
  • range_first
  • range_last
  • range_quantile
  • smooth_exponential
  • ceil
  • floor
  • round
  • clamp_min
  • clamp_max
  • max_over_time
  • min_over_time
  • avg_over_time
  • quantile_over_time
  • mode_over_time
  • geomean_over_time
  • holt_winters
  • predict_linear See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/674

• BUGFIX: properly handle stale time series after K8S deployment. Previously such time series could be double-counted. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748

• BUGFIX: return a single time series at max from absent() function like Prometheus does.

• BUGFIX: vmalert: accept days, weeks and years in for: part of config like Prometheus does. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/817

• BUGFIX: fix mode_over_time(m[d]) calculations. Previously the function could return incorrect results.

v1.43.0

• FEATURE: reduce CPU usage for repeated queries over sliding time window when no new time series are added to the database. Typical use cases: repeated evaluation of alerting rules in vmalert or dashboard auto-refresh in Grafana.

• FEATURE: vmagent: add OpenStack service discovery aka openstack_sd_config. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/728 .

• FEATURE: vmalert: make -maxIdleConnections configurable for datasource HTTP client. This option can be used for minimizing connection churn. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/795 .

• FEATURE: add -influx.maxLineSize command-line flag for configuring the maximum size for a single Influx line during parsing. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/807

• BUGFIX: properly handle inf values during background merge of LSM parts. Previously Inf values could result in NaN values for adjancent samples in time series. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/805 .

• BUGFIX: fill gaps on graphs for range_* and running_* functions. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/806 .

• BUGFIX: make a copy of label with new name during relabeling with action: labelmap in the same way as Prometheus does. Previously the original label name has been replaced. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/812 .

• BUGFIX: support parsing floating-point timestamp like Graphite Carbon does. Such timestmaps are truncated to seconds.

v1.42.0

• FEATURE: use all the available CPU cores when accepting data via a single TCP connection for all the supported protocols. Previously data ingested via a single TCP connection could use only a single CPU core. This could limit data ingestion performance. The main benefit of this feature is that data can be imported at max speed via a single connection - there is no need to open multiple concurrent connections to VictoriaMetrics or vmagent in order to achieve the maximum data ingestion speed.

• FEATURE: cluster: improve performance for data ingestion path from vminsert to vmstorage nodes. The maximum data ingestion performance for a single connection between vminsert and vmstorage node scales with the number of available CPU cores on vmstorage side. This should help with https://github.com/VictoriaMetrics/VictoriaMetrics/issues/791 .

• FEATURE: add ability to export / import data in native format via /api/v1/export/native and /api/v1/import/native. This is the most optimized approach for data migration between VictoriaMetrics instances. Both single-node and cluster instances are supported. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/787#issuecomment-700632551 .

• FEATURE: add reduce_mem_usage query option to /api/v1/export in order to reduce memory usage during data export / import. See these docs for details.

• FEATURE: improve performance for /api/v1/series handler when it returns big number of time series.

• FEATURE: add vm_merge_need_free_disk_space metric, which can be used for estimating the number of deferred background data merges due to the lack of free disk space. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/686 .

• FEATURE: add OpenBSD support. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/785 .

• BUGFIX: properly apply -search.maxStalenessInterval command-line flag value. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/784 .

• BUGFIX: fix displaying data in Grafana tables. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/720 .

• BUGFIX: do not adjust the number of detected CPU cores found at /sys/devices/system/cpu/online. The adjustement was increasing the resulting GOMAXPROC by 1, which looked confusing to users. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/685#issuecomment-698595309 .

• BUGFIX: vmagent: do not show -remoteWrite.url in initial logs if -remoteWrite.showURL isn't set. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/773 .

• BUGFIX: properly handle case when /metrics/find finds both a leaf and a node for the given query=prefix.*. In this case only the node must be returned with stripped dot in the end of id as carbonapi does.

Previous releases

See releases page.