Loki: Enable Query Splitting by default (#72094)

* lokiQuerySplitting: enable feature flag by default

* Query stats: add special note for stats + splitting

docs/sources/setup-grafana/configure-grafana/feature-toggles/index.md

@@ -34,6 +34,7 @@ Some features are enabled by default. You can disable these feature by setting t
 | `disablePrometheusExemplarSampling`              | Disable Prometheus exemplar sampling                                                                                                                                                                |                    |
 | `logsSampleInExplore`                            | Enables access to the logs sample feature in Explore                                                                                                                                                | Yes                |
 | `logsContextDatasourceUi`                        | Allow datasource to provide custom UI for context view                                                                                                                                              | Yes                |
+| `lokiQuerySplitting`                             | Split large interval queries into subqueries with smaller time intervals                                                                                                                            | Yes                |
 | `prometheusMetricEncyclopedia`                   | Adds the metrics explorer component to the Prometheus query builder as an option in metric select                                                                                                   | Yes                |
 | `prometheusDataplane`                            | Changes responses to from Prometheus to be compliant with the dataplane specification. In particular it sets the numeric Field.Name from 'Value' to the value of the `__name__` label when present. | Yes                |
 | `lokiMetricDataplane`                            | Changes metric responses from Loki to be compliant with the dataplane specification.                                                                                                                | Yes                |
@@ -90,7 +91,6 @@ Experimental features might be changed or removed without prior notice.
 | `nestedFolderPicker`                        | Enables the still in-development new folder picker to support nested folders                                 |
 | `alertingBacktesting`                       | Rule backtesting API for alerting                                                                            |
 | `editPanelCSVDragAndDrop`                   | Enables drag and drop for CSV and Excel files                                                                |
-| `lokiQuerySplitting`                        | Split large interval queries into subqueries with smaller time intervals                                     |
 | `lokiQuerySplittingConfig`                  | Give users the option to configure split durations for Loki queries                                          |
 | `individualCookiePreferences`               | Support overriding cookie preferences per user                                                               |
 | `onlyExternalOrgRoleSync`                   | Prohibits a user from changing organization roles synced with external auth providers                        |

pkg/services/featuremgmt/registry.go

@@ -305,9 +305,10 @@ var (
 		{
 			Name:         "lokiQuerySplitting",
 			Description:  "Split large interval queries into subqueries with smaller time intervals",
-			Stage:        FeatureStageExperimental,
+			Stage:        FeatureStageGeneralAvailability,
 			FrontendOnly: true,
 			Owner:        grafanaObservabilityLogsSquad,
+			Expression:   "true", // turned on by default
 		},
 		{
 			Name:         "lokiQuerySplittingConfig",

pkg/services/featuremgmt/toggles_gen.csv

@@ -43,7 +43,7 @@ editPanelCSVDragAndDrop,experimental,@grafana/grafana-bi-squad,false,false,false
 alertingNoNormalState,preview,@grafana/alerting-squad,false,false,false,false
 logsSampleInExplore,GA,@grafana/observability-logs,false,false,false,true
 logsContextDatasourceUi,GA,@grafana/observability-logs,false,false,false,true
-lokiQuerySplitting,experimental,@grafana/observability-logs,false,false,false,true
+lokiQuerySplitting,GA,@grafana/observability-logs,false,false,false,true
 lokiQuerySplittingConfig,experimental,@grafana/observability-logs,false,false,false,true
 individualCookiePreferences,experimental,@grafana/backend-platform,false,false,false,false
 onlyExternalOrgRoleSync,experimental,@grafana/grafana-authnz-team,false,false,false,false

public/app/plugins/datasource/prometheus/querybuilder/shared/QueryOptionGroup.tsx

@@ -4,7 +4,8 @@ import { useToggle } from 'react-use';
 
 import { getValueFormat, GrafanaTheme2 } from '@grafana/data';
 import { Stack } from '@grafana/experimental';
-import { Collapse, useStyles2 } from '@grafana/ui';
+import { config } from '@grafana/runtime';
+import { Collapse, Icon, Tooltip, useStyles2 } from '@grafana/ui';
 import { QueryStats } from 'app/plugins/datasource/loki/types';
 
 export interface Props {
@@ -45,6 +46,11 @@ export function QueryOptionGroup({ title, children, collapsedInfo, queryStats }:
       >
         <div className={styles.body}>{children}</div>
       </Collapse>
+      {queryStats && config.featureToggles.lokiQuerySplitting && (
+        <Tooltip content="Note: the query will be split into multiple parts and executed in sequence. Query limits will only apply each individual part.">
+          <Icon tabIndex={0} name="info-circle" className={styles.tooltip} size="sm" />
+        </Tooltip>
+      )}
       {queryStats && <p className={styles.stats}>This query will process approximately {convertUnits()}.</p>}
     </div>
   );
@@ -92,5 +98,8 @@ const getStyles = (theme: GrafanaTheme2) => {
       color: theme.colors.text.secondary,
       fontSize: theme.typography.bodySmall.fontSize,
     }),
+    tooltip: css({
+      marginRight: theme.spacing(0.25),
+    }),
   };
 };