update automatically settting gomemlimit

CHANGELOG.md

@@ -39,6 +39,8 @@ Main (unreleased)
 - (_Public preview_) Added rate limiting of cluster state changes to reduce the
   number of unnecessary, intermediate state updates. (@thampiotr)
 
+- Graduate automatically setting GOMEMLIMIT to Generally Available from Public Preview. (@mattdurham)
+
 ### Bugfixes
 
 - Fixed a clustering mode issue where a fatal startup failure of the clustering service

docs/sources/reference/cli/environment-variables.md

@@ -14,6 +14,7 @@ The following environment variables are supported:
 
 * `GODEBUG`
 * `HTTP_PROXY`
+* `GOMEMLIMIT`
 
 Refer to the [Go runtime][runtime] documentation for more information about Go runtime environment variables.
 
@@ -35,4 +36,23 @@ Argument                   | Description                                     | D
 ---------------------------|-------------------------------------------------|--------
 `http://proxy.example.com` | The hostname or IP address of the proxy server. |
 
+### GOMEMLIMIT
+
+Usually, the [Go runtime][runtime] will release memory back to the operating system when requested.
+In some environments, this may cause issues such as Out Of Memory (OOM) errors.
+You can use the `GOMEMLIMIT` environment variable to set a soft memory cap and limit the maximum memory {{< param "PRODUCT_NAME" >}} can use.
+You can set `GOMEMLIMIT` to a numeric value in bytes with an optional unit suffix.
+The supported unit suffixes are `B`, `KiB`, `MiB`, `GiB`, and `TiB`.
+Don't treat the `GOMEMLIMIT` environment variable as a hard memory limit.
+{{< param "PRODUCT_NAME" >}}  processes can use more memory if that memory is required.
+A rough number is to set `GOMEMLIMIT` to is 90% of the maximum memory required.
+For example, if you want to keep memory usage below `10GiB`, use `GOMEMLIMIT=8GiB`.
+
+#### Automatic setting of GOMEMLIMIT
+
+The `GOMEMLIMIT` environment variable is set automatically {{< param "PRODUCT_NAME" >}} can determine the appropriate value.
+If you set the `GOMEMLIMIT` environment variable before you run  {{< param "PRODUCT_NAME" >}} then that setting will be used.
+The variable value is set to 90% of the `cgroup` value set.
+No changes will occur if the limit cannot be determined and you did not explicitly define a  `GOMEMLIMIT` value.
+
 [runtime]: https://pkg.go.dev/runtime

docs/sources/reference/cli/run.md

@@ -165,7 +165,6 @@ original configuration.
 Include `--config.extra-args` to pass additional command line flags from the original format to the converter.
 Refer to [alloy convert][] for more details on how `extra-args` work.
 
-
 [alloy convert]: ../convert/
 [clustering]:  ../../../concepts/clustering/
 [go-discover]: https://github.com/hashicorp/go-discover

internal/alloycli/cmd_run.go

@@ -200,9 +200,7 @@ func (fr *alloyRun) Run(configPath string) error {
 
 	// Set the memory limit, this will honor GOMEMLIMIT if set
 	// If there is a cgroup will follow that
-	if fr.minStability.Permits(featuregate.StabilityPublicPreview) {
-		memlimit.SetGoMemLimitWithOpts(memlimit.WithLogger(slog.New(l.Handler())))
-	}
+	memlimit.SetGoMemLimitWithOpts(memlimit.WithLogger(slog.New(l.Handler())))
 
 	// Enable the profiling.
 	setMutexBlockProfiling(l)