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Track db txn time in millisecs

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... to reduce the amount of floating-point foo we do.
This commit is contained in:
Richard van der Hoff 2018-01-11 18:17:54 +00:00
parent 44a498418c
commit 6324b65f08
4 changed files with 17 additions and 10 deletions
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4
synapse/http/server.py
View file

@ -93,6 +93,8 @@ response_db_txn_count = metrics.register_counter(
),
)
# seconds spent waiting for db txns, excluding scheduling time, when processing
# this request
response_db_txn_duration = metrics.register_counter(
"response_db_txn_duration_seconds", labels=["method", "servlet", "tag"],
alternative_names=(
@ -377,7 +379,7 @@ class RequestMetrics(object):
context.db_txn_count, request.method, self.name, tag
)
response_db_txn_duration.inc_by(
context.db_txn_duration, request.method, self.name, tag
context.db_txn_duration_ms / 1000., request.method, self.name, tag
)

6
synapse/http/site.py
View file

@ -66,10 +66,10 @@ class SynapseRequest(Request):
context = LoggingContext.current_context()
ru_utime, ru_stime = context.get_resource_usage()
db_txn_count = context.db_txn_count
db_txn_duration = context.db_txn_duration
db_txn_duration_ms = context.db_txn_duration_ms
except Exception:
ru_utime, ru_stime = (0, 0)
db_txn_count, db_txn_duration = (0, 0)
db_txn_count, db_txn_duration_ms = (0, 0)
self.site.access_logger.info(
"%s - %s - {%s}"
@ -81,7 +81,7 @@ class SynapseRequest(Request):
int(time.time() * 1000) - self.start_time,
int(ru_utime * 1000),
int(ru_stime * 1000),
int(db_txn_duration * 1000),
db_txn_duration_ms,
int(db_txn_count),
self.sentLength,
self.code,

9
synapse/util/logcontext.py
View file

@ -59,7 +59,7 @@ class LoggingContext(object):
__slots__ = [
"previous_context", "name", "ru_stime", "ru_utime",
"db_txn_count", "db_txn_duration", "usage_start", "usage_end",
"db_txn_count", "db_txn_duration_ms", "usage_start", "usage_end",
"main_thread", "alive",
"request", "tag",
]
@ -97,7 +97,10 @@ class LoggingContext(object):
self.ru_stime = 0.
self.ru_utime = 0.
self.db_txn_count = 0
self.db_txn_duration = 0.
# ms spent waiting for db txns, excluding scheduling time
self.db_txn_duration_ms = 0
self.usage_start = None
self.usage_end = None
self.main_thread = threading.current_thread()
@ -205,7 +208,7 @@ class LoggingContext(object):
def add_database_transaction(self, duration_ms):
self.db_txn_count += 1
self.db_txn_duration += duration_ms / 1000.
self.db_txn_duration_ms += duration_ms
class LoggingContextFilter(logging.Filter):

8
synapse/util/metrics.py
View file

@ -72,6 +72,7 @@ block_db_txn_count = metrics.register_counter(
),
)
# seconds spent waiting for db txns, excluding scheduling time, in this block
block_db_txn_duration = metrics.register_counter(
"block_db_txn_duration_seconds", labels=["block_name"],
alternative_names=(
@ -95,7 +96,7 @@ def measure_func(name):
class Measure(object):
__slots__ = [
"clock", "name", "start_context", "start", "new_context", "ru_utime",
"ru_stime", "db_txn_count", "db_txn_duration", "created_context"
"ru_stime", "db_txn_count", "db_txn_duration_ms", "created_context"
]
def __init__(self, clock, name):
@ -115,7 +116,7 @@ class Measure(object):
self.ru_utime, self.ru_stime = self.start_context.get_resource_usage()
self.db_txn_count = self.start_context.db_txn_count
self.db_txn_duration = self.start_context.db_txn_duration
self.db_txn_duration_ms = self.start_context.db_txn_duration_ms
def __exit__(self, exc_type, exc_val, exc_tb):
if isinstance(exc_type, Exception) or not self.start_context:
@ -145,7 +146,8 @@ class Measure(object):
context.db_txn_count - self.db_txn_count, self.name
)
block_db_txn_duration.inc_by(
context.db_txn_duration - self.db_txn_duration, self.name
(context.db_txn_duration_ms - self.db_txn_duration_ms) / 1000.,
self.name
)
if self.created_context: