.TH "Gc.Tweak" 3 2026-06-22 OCamldoc "OCaml library"
.SH NAME
Gc.Tweak \- GC Tweaks are unstable and undocumented configurable GC parameters, primarily intended for use by GC developers.
.SH Module
Module   Gc.Tweak
.SH Documentation
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Module
.BI "Tweak"
 : 
.B sig end

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GC Tweaks are unstable and undocumented configurable GC parameters,
primarily intended for use by GC developers\&.
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As well as using Gc\&.Tweak\&.set "foo" 42, they can also be configured in
OCAMLRUNPARAM, using the following syntax:
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OCAMLRUNPARAM=\&'Xfoo=42\&'
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Additionally, OCAMLRUNPARAM=Xhelp will show the available GC tweaks\&.

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.B "Since"
5.5

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.I val set 
: 
.B string -> int -> unit
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Change a parameter\&.
Raises Invalid_argument if no such parameter exists

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.I val get 
: 
.B string -> int
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Retrieve a parameter value\&.
Raises Invalid_argument if no such parameter exists

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.I val list_active 
: 
.B unit -> (string * int) list
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Returns the list of parameters and their values that currently
have non\-default values

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