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Rework this a little to be more inline with the other READMEs Signed-off-by: Miek Gieben <miek@miek.nl>
75 lines
1.6 KiB
Markdown
75 lines
1.6 KiB
Markdown
# pprof
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## Name
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*pprof* - publishes runtime profiling data at endpoints under `/debug/pprof`.
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## Description
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You can visit `/debug/pprof` on your site for an index of the available endpoints. By default it
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will listen on localhost:6053.
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This is a debugging tool. Certain requests (such as collecting execution traces) can be slow. If
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you use pprof on a live server, consider restricting access or enabling it only temporarily.
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This plugin can only be used once per Server Block.
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## Syntax
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~~~ txt
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pprof [ADDRESS]
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~~~
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Optionally pprof takes an address; the default is `localhost:6053`.
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An extra option can be set with this extended syntax:
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~~~ txt
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pprof [ADDRESS] {
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block [RATE]
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}
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~~~
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* `block` option enables block profiling, **RATE** defaults to 1. **RATE** must be a positive value.
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See [Diagnostics, chapter profiling](https://golang.org/doc/diagnostics.html) and
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[runtime.SetBlockProfileRate](https://golang.org/pkg/runtime/#SetBlockProfileRate) for what block
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profiling entails.
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## Examples
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Enable a pprof endpoint:
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~~~
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. {
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pprof
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}
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~~~
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And use the pprof tool to get statistics: `go tool pprof http://localhost:6053`.
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Listen on an alternate address:
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~~~ txt
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. {
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pprof 10.9.8.7:6060
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}
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~~~
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Listen on an all addresses on port 6060, and enable block profiling
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~~~ txt
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. {
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pprof :6060 {
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block
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}
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}
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~~~
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## Also See
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See [Go's pprof documentation](https://golang.org/pkg/net/http/pprof/) and [Profiling Go
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Programs](https://blog.golang.org/profiling-go-programs).
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See [runtime.SetBlockProfileRate](https://golang.org/pkg/runtime/#SetBlockProfileRate) for
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background on block profiling.
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