In this case the _msg field is set to the value specified in the -defaultMsgValue command-line flag.
This should simplify first-time migration to VictoriaLogs from other systems.
- Remove leading whitespace from the first lines in 'HTTP parameters' chapter.
This whitespace isn't needed for the markdown formatting.
- Add leading whitespace for the second sentence in the list bullet describing AccountID and ProjectID HTTP headers.
This fixes markdown formatting for this list bullet.
This msy be useful when ingesting logs from different sources, which store the log message in different fields.
For example, `_msg_field=message,event.data,some_field` will get log message from the first non-empty field:
`message`, `event.data` and `some_field`.
If the number of output (bloom, values) shards is zero, then this may lead to panic
as shown at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/7391 .
This panic may happen when parts with only constant fields with distinct values are merged into
output part with non-constant fields, which should be written to (bloom, values) shards.
This allows reducing the amounts of data, which must be read during queries over logs with big number of fields (aka "wide events").
This, in turn, improves query performance when the data, which needs to be scanned during the query, doesn't fit OS page cache.
This improves performance of `field_values` pipe when it is applied to large number of data blocks.
This also improves performance of /select/logsql/field_values HTTP API.
### Describe Your Changes
Fixes issues with incorrect updating of query and limit fields, and
resolves the problem where the display tab resets.
Related issue: #7279 and #7290
### Checklist
The following checks are **mandatory**:
- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
---------
Signed-off-by: hagen1778 <roman@victoriametrics.com>
Co-authored-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
### Describe Your Changes
**Added ability to hide the hits chart**
- Users can now hide or show the hits chart by clicking the "eye" icon
located in the upper-right corner of the chart.
- When the chart is hidden, it will stop sending requests to
`/select/logsql/hits`.
- Upon displaying the chart again, it will automatically refresh. If a
relative time range is set, the chart will update according to the time
period of the logs currently being displayed.
**Hits chart visible:**
**Hits chart hidden:**
Related issue: #7117
### Checklist
The following checks are **mandatory**:
- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
### Describe Your Changes
Fixed the display of hits chart in VictoriaLogs.
See #7133
### Checklist
The following checks are **mandatory**:
- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
Unpack the full columnsHeader block instead of unpacking meta-information per each individual column
when the query, which selects all the columns, is executed. This improves performance when scanning
logs with big number of fields.
- Use parallel merge of per-CPU shard results. This improves merge performance on multi-CPU systems.
- Use topN heap sort of per-shard results. This improves performance when results contain millions of entries.
