Log Odoo cache statistics

ir_http.py

# -*- coding: utf-8 -*-
# Copyright 2016 Camptocamp SA
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)

import logging
import random
import threading

from collections import defaultdict

from openerp import models
from openerp.modules.registry import RegistryManager
from openerp.tools.cache import STAT


_logger = logging.getLogger('monitoring.cache')


class IrHttp(models.AbstractModel):
    _inherit = 'ir.http'

    @staticmethod
    def log_ormcache_stats():
        """ Log statistics of ormcache usage by database, model, and method.
        """
        me = threading.currentThread()
        me_dbname = me.dbname
        entries = defaultdict(int)
        for dbname, reg in RegistryManager.registries.iteritems():
            for key in reg.cache.iterkeys():
                entries[(dbname,) + key[:2]] += 1
        for key, count in sorted(entries.items()):
            dbname, model_name, method = key
            me.dbname = dbname
            stat = STAT[key]
            info = {
                'dbname': dbname,
                'model_name': model_name,
                'method': method.__name__,
                'count': count,
                'hit': stat.hit,
                'miss': stat.miss,
                'err': stat.err,
                'ratio': stat.ratio,
            }
            _logger.info(info)

        me.dbname = me_dbname

    def _dispatch(self):
        response = super(IrHttp, self)._dispatch()
        if random.random() < 0.01:
            self.log_ormcache_stats()
        return response