NewsBlur/config/munin/mongodb_memory

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from munin.mongodb import MuninMongoDBPlugin

class MongoDBMemoryPlugin(MuninMongoDBPlugin):
    args = "-l 0 --base 1024"
    vlabel = "bytes"
    title = "MongoDB memory usage"
    info = "Memory usage"
    fields = (
        ('virtual', dict(
            label = "virtual",
            info = "Bytes of virtual memory",
            type = "GAUGE",
            min = "0",
        )),
        ('resident', dict(
            label = "resident",
            info = "Bytes of resident memory",
            type = "GAUGE",
            min = "0",
        )),
        ('mapped', dict(
            label = "mapped",
            info = "Bytes of mapped memory",
            type = "GAUGE",
            min = "0",
        )),
    )

    def execute(self):
        status = self.connection.admin.command('serverStatus')
        values = {}
        for k in ("virtual", "resident", "mapped"):
            try:
                value = int(status["mem"][k]) * 1024 * 1024
            except KeyError:
                value = "U"
            values[k] = value
        return values

if __name__ == "__main__":
    MongoDBMemoryPlugin().run()