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libvmod-jemalloc's Introduction

vmod_jemalloc

Varnish jemalloc VMOD

Date: 2016-03-29
Version: 1.0
Manual section:3

SYNOPSIS

import jemalloc;

DESCRIPTION

Get internal jemalloc statistics

FUNCTIONS

print_stats

Prototype
print_stats(STRING options = "")
Return value
VOID
Description
Prints jemalloc stats to varnishlog. Supports optional jemalloc print options.
Example
jemalloc.print_stats(STRING options = "");

get_stats

Prototype
get_stats()
Return value
STRING
Description
Gets jemalloc stats as a STRING (not header safe, requires ~50k workspace). Supports optional jemalloc print options.
Example
synthetic(jemalloc.get_stats(options = "a"));

USAGE EXAMPLE

In your VCL you could then use this vmod along the following lines:

import jemalloc;

sub vcl_recv {
        if(req.url == "/jemalloc") {
                return (synth(200, "JEMALLOC"));
        }
}

sub vcl_synth {
        set resp.http.Content-Type = "text/plain; charset=utf-8";
        synthetic(jemalloc.get_stats(options = "a"));
        return (deliver);
}

sub vcl_deliver {
        if (req.http.jemalloc) {
                jemalloc.print_stats();
        }
}

libvmod-jemalloc's People

Contributors

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Watchers

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