MatrixSynapse/synapse/util/metrics.py

123 lines
4.2 KiB
Python
Raw Normal View History

2016-02-04 11:15:56 +01:00
# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
2016-02-04 11:15:56 +01:00
2018-05-22 02:47:37 +02:00
from prometheus_client import Counter
2016-02-04 11:15:56 +01:00
from synapse.util.logcontext import LoggingContext
from functools import wraps
2016-02-04 11:15:56 +01:00
import logging
logger = logging.getLogger(__name__)
2018-05-22 02:47:37 +02:00
block_counter = Counter("synapse_util_metrics_block_count", "", ["block_name"])
2016-02-04 11:15:56 +01:00
2018-05-22 02:47:37 +02:00
block_timer = Counter("synapse_util_metrics_block_time_seconds", "", ["block_name"])
2018-05-23 00:32:57 +02:00
block_ru_utime = Counter(
"synapse_util_metrics_block_ru_utime_seconds", "", ["block_name"])
2018-05-22 02:47:37 +02:00
2018-05-23 00:32:57 +02:00
block_ru_stime = Counter(
"synapse_util_metrics_block_ru_stime_seconds", "", ["block_name"])
2018-05-22 02:47:37 +02:00
2018-05-23 00:32:57 +02:00
block_db_txn_count = Counter(
"synapse_util_metrics_block_db_txn_count", "", ["block_name"])
Reorganise request and block metrics In order to circumvent the number of duplicate foo:count metrics increasing without bounds, it's time for a rearrangement. The following are all deprecated, and replaced with synapse_util_metrics_block_count: synapse_util_metrics_block_timer:count synapse_util_metrics_block_ru_utime:count synapse_util_metrics_block_ru_stime:count synapse_util_metrics_block_db_txn_count:count synapse_util_metrics_block_db_txn_duration:count The following are all deprecated, and replaced with synapse_http_server_response_count: synapse_http_server_requests synapse_http_server_response_time:count synapse_http_server_response_ru_utime:count synapse_http_server_response_ru_stime:count synapse_http_server_response_db_txn_count:count synapse_http_server_response_db_txn_duration:count The following are renamed (the old metrics are kept for now, but deprecated): synapse_util_metrics_block_timer:total -> synapse_util_metrics_block_time_seconds synapse_util_metrics_block_ru_utime:total -> synapse_util_metrics_block_ru_utime_seconds synapse_util_metrics_block_ru_stime:total -> synapse_util_metrics_block_ru_stime_seconds synapse_util_metrics_block_db_txn_count:total -> synapse_util_metrics_block_db_txn_count synapse_util_metrics_block_db_txn_duration:total -> synapse_util_metrics_block_db_txn_duration_seconds synapse_http_server_response_time:total -> synapse_http_server_response_time_seconds synapse_http_server_response_ru_utime:total -> synapse_http_server_response_ru_utime_seconds synapse_http_server_response_ru_stime:total -> synapse_http_server_response_ru_stime_seconds synapse_http_server_response_db_txn_count:total -> synapse_http_server_response_db_txn_count synapse_http_server_response_db_txn_duration:total synapse_http_server_response_db_txn_duration_seconds
2018-01-15 18:00:12 +01:00
# seconds spent waiting for db txns, excluding scheduling time, in this block
2018-05-23 00:32:57 +02:00
block_db_txn_duration = Counter(
"synapse_util_metrics_block_db_txn_duration_seconds", "", ["block_name"])
2016-02-04 11:15:56 +01:00
# seconds spent waiting for a db connection, in this block
2018-05-23 00:32:57 +02:00
block_db_sched_duration = Counter(
"synapse_util_metrics_block_db_sched_duration_seconds", "", ["block_name"])
2016-02-04 11:15:56 +01:00
def measure_func(name):
def wrapper(func):
@wraps(func)
@defer.inlineCallbacks
def measured_func(self, *args, **kwargs):
with Measure(self.clock, name):
r = yield func(self, *args, **kwargs)
defer.returnValue(r)
return measured_func
return wrapper
2016-02-04 11:15:56 +01:00
class Measure(object):
2016-02-09 12:06:19 +01:00
__slots__ = [
"clock", "name", "start_context", "start", "new_context", "ru_utime",
"ru_stime",
2018-05-28 11:51:53 +02:00
"db_txn_count", "db_txn_duration_sec", "db_sched_duration_sec",
"created_context",
2016-02-09 12:06:19 +01:00
]
2016-02-04 11:15:56 +01:00
def __init__(self, clock, name):
self.clock = clock
self.name = name
self.start_context = None
self.start = None
self.created_context = False
2016-02-04 11:15:56 +01:00
def __enter__(self):
self.start = self.clock.time()
2016-02-04 11:15:56 +01:00
self.start_context = LoggingContext.current_context()
if not self.start_context:
self.start_context = LoggingContext("Measure")
self.start_context.__enter__()
self.created_context = True
self.ru_utime, self.ru_stime = self.start_context.get_resource_usage()
self.db_txn_count = self.start_context.db_txn_count
2018-05-28 11:51:53 +02:00
self.db_txn_duration_sec = self.start_context.db_txn_duration_sec
self.db_sched_duration_sec = self.start_context.db_sched_duration_sec
2016-02-04 11:15:56 +01:00
def __exit__(self, exc_type, exc_val, exc_tb):
2016-08-19 19:13:07 +02:00
if isinstance(exc_type, Exception) or not self.start_context:
2016-02-04 11:15:56 +01:00
return
duration = self.clock.time() - self.start
2018-05-22 02:47:37 +02:00
block_counter.labels(self.name).inc()
block_timer.labels(self.name).inc(duration)
2016-02-04 11:15:56 +01:00
2016-02-09 12:06:19 +01:00
context = LoggingContext.current_context()
2016-02-04 11:15:56 +01:00
2016-02-09 12:06:19 +01:00
if context != self.start_context:
2016-02-04 11:15:56 +01:00
logger.warn(
2016-07-26 10:09:25 +02:00
"Context has unexpectedly changed from '%s' to '%s'. (%r)",
2016-08-10 15:21:10 +02:00
self.start_context, context, self.name
2016-02-04 11:15:56 +01:00
)
return
2016-02-04 11:22:44 +01:00
if not context:
logger.warn("Expected context. (%r)", self.name)
return
2016-02-04 11:15:56 +01:00
ru_utime, ru_stime = context.get_resource_usage()
2018-05-22 02:47:37 +02:00
block_ru_utime.labels(self.name).inc(ru_utime - self.ru_utime)
block_ru_stime.labels(self.name).inc(ru_stime - self.ru_stime)
block_db_txn_count.labels(self.name).inc(context.db_txn_count - self.db_txn_count)
block_db_txn_duration.labels(self.name).inc(
context.db_txn_duration_sec - self.db_txn_duration_sec)
2018-05-22 02:47:37 +02:00
block_db_sched_duration.labels(self.name).inc(
context.db_sched_duration_sec - self.db_sched_duration_sec)
if self.created_context:
self.start_context.__exit__(exc_type, exc_val, exc_tb)