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65 lines
2.3 KiB
Markdown
65 lines
2.3 KiB
Markdown
# automemlimit
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[](https://pkg.go.dev/github.com/KimMachineGun/automemlimit)
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[](https://goreportcard.com/report/github.com/KimMachineGun/automemlimit)
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[](https://github.com/KimMachineGun/automemlimit/actions/workflows/test.yml)
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Automatically set `GOMEMLIMIT` to match Linux [cgroups(7)](https://man7.org/linux/man-pages/man7/cgroups.7.html) memory limit.
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See more details about `GOMEMLIMIT` [here](https://tip.golang.org/doc/gc-guide#Memory_limit).
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## Notice
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Version `v0.5.0` introduces a fallback to system memory limits as an experimental feature when cgroup limits are unavailable. Activate this by setting `AUTOMEMLIMIT_EXPERIMENT=system`.
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You can also use system memory limits via `memlimit.FromSystem` provider directly.
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This feature is under evaluation and might become a default or be removed based on user feedback.
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If you have any feedback about this feature, please open an issue.
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## Installation
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```shell
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go get github.com/KimMachineGun/automemlimit@latest
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```
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## Usage
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```go
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package main
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// By default, it sets `GOMEMLIMIT` to 90% of cgroup's memory limit.
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// This is equivalent to `memlimit.SetGoMemLimitWithOpts(memlimit.WithLogger(slog.Default()))`
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// To disable logging, use `memlimit.SetGoMemLimitWithOpts` directly.
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import _ "github.com/KimMachineGun/automemlimit"
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```
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or
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```go
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package main
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import "github.com/KimMachineGun/automemlimit/memlimit"
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func init() {
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memlimit.SetGoMemLimitWithOpts(
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memlimit.WithRatio(0.9),
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memlimit.WithProvider(memlimit.FromCgroup),
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memlimit.WithLogger(slog.Default()),
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)
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memlimit.SetGoMemLimitWithOpts(
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memlimit.WithRatio(0.9),
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memlimit.WithProvider(
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memlimit.ApplyFallback(
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memlimit.FromCgroup,
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memlimit.FromSystem,
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),
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),
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)
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memlimit.SetGoMemLimit(0.9)
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memlimit.SetGoMemLimitWithProvider(memlimit.Limit(1024*1024), 0.9)
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memlimit.SetGoMemLimitWithProvider(memlimit.FromCgroup, 0.9)
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memlimit.SetGoMemLimitWithProvider(memlimit.FromCgroupV1, 0.9)
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memlimit.SetGoMemLimitWithProvider(memlimit.FromCgroupHybrid, 0.9)
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memlimit.SetGoMemLimitWithProvider(memlimit.FromCgroupV2, 0.9)
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}
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```
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