VictoriaMetrics/CHANGELOG.md

tip

• 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: 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.

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.