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VictoriaMetrics v1.44.0 Release Notes

Release Date: 2020-10-13 // over 3 years ago

  • 🔄 Changes since v1.43.0

    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 #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 #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 #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 #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 #674

    🛠 BUGFIX: properly handle stale time series after K8S deployment. Previously such time series could be double-counted. See #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 #817

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

    How to run VictoriaMetrics

    📄 Unpack the victoria-metrics-*.tar.gz archive and read these docs.

    vmutils-*.tag.gz archive contains the following tools:

    🐳 The corresponding docker images are available here.
    Cluster version is available here.

    🚀 vmctl releases are available here.