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Add monitoring for app connections to the db (#2235)

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Adrià Casajús 2024-09-27 08:00:25 +02:00 committed by GitHub
parent 20c1145a1d
commit df4c52815b
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2 changed files with 18 additions and 1 deletions
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4
events/event_source.py
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@ -72,7 +72,9 @@ class PostgresEventSource(EventSource):
Session.close() # Ensure we get a new connection and we don't leave a dangling tx
def __connect(self):
self.__connection = psycopg2.connect(self.__connection_string)
self.__connection = psycopg2.connect(
self.__connection_string, application_name="sl-event-listen"
)
from app.db import Session

15
monitoring.py
View file

@ -94,6 +94,20 @@ def log_nb_db_connection():
newrelic.agent.record_custom_metric("Custom/nb_db_connections", nb_connection)
@newrelic.agent.background_task()
def log_nb_db_connection_by_app_name():
# get the number of connections to the DB
rows = Session.execute(
"SELECT application_name, count(datid) FROM pg_stat_activity group by application_name"
)
for row in rows:
if row[0].find("sl-") == 0:
LOG.d("number of db connections for app %s = %s", row[0], row[1])
newrelic.agent.record_custom_metric(
f"Custom/nb_db_app_connection/{row[0]}", row[1]
)
@newrelic.agent.background_task()
def log_pending_to_process_events():
r = Session.execute("select count(*) from sync_event WHERE taken_time IS NULL;")
@ -148,6 +162,7 @@ if __name__ == "__main__":
log_pending_to_process_events()
log_events_pending_dead_letter()
log_failed_events()
log_nb_db_connection_by_app_name()
Session.close()
exporter.run()