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Add more logging to debug slow startup (#8264)

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I'm hoping this will provide some pointers for debugging
https://github.com/matrix-org/synapse/issues/7968.
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Richard van der Hoff 2020-09-07 13:36:02 +01:00 • committed by GitHub
parent 96312536f2
commit 0dae7d80bf
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5 changed files with 33 additions and 7 deletions
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5
synapse/storage/util/id_generators.py
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@ -15,6 +15,7 @@
import contextlib
import heapq
import logging
import threading
from collections import deque
from typing import Dict, List, Set
@ -24,6 +25,8 @@ from typing_extensions import Deque
from synapse.storage.database import DatabasePool, LoggingTransaction
from synapse.storage.util.sequence import PostgresSequenceGenerator
logger = logging.getLogger(__name__)
class IdGenerator:
def __init__(self, db_conn, table, column):
@ -48,6 +51,8 @@ def _load_current_id(db_conn, table, column, step=1):
Returns:
int
"""
# debug logging for https://github.com/matrix-org/synapse/issues/7968
logger.info("initialising stream generator for %s(%s)", table, column)
cur = db_conn.cursor()
if step == 1:
cur.execute("SELECT MAX(%s) FROM %s" % (column, table))