Aurora PostgreSQLにパッチを適用した際のダウンタイムログ

パッチの中身に依存するので参考までに。この時のパッチ適用の実質的なダウンタイムは約7秒だった。

スクリプト

import psycopg2
import psycopg2.extras
import time
import datetime

for i in range(20000):
  try:
    dt_now = datetime.datetime.now()
    conn = psycopg2.connect("host=auroraserverlessv2.cluster-cm678nkt5thr.ap-northeast-1.rds.amazonaws.com port=5432 dbname=postgres user=postgres password=postgres")
    cur = conn.cursor()
    cur.execute("insert into zdptest (time) values (current_timestamp)")
    print(dt_now)
    time.sleep(1)
    conn.commit()
    cur.close()
    conn.close()
  except:
    pass

ログ

2022-06-28 13:52:53 UTC::@:[31196]:LOG:  starting PostgreSQL 13.6 on aarch64-unknown-linux-gnu, compiled by aarch64-unknown-linux-gnu-gcc (GCC) 7.4.0, 64-bit
2022-06-28 13:52:53 UTC::@:[31196]:LOG:  listening on IPv4 address "0.0.0.0", port 5432
2022-06-28 13:52:53 UTC::@:[31196]:LOG:  listening on IPv6 address "::", port 5432
2022-06-28 13:52:53 UTC::@:[31196]:LOG:  listening on Unix socket "/tmp/.s.PGSQL.5432"
2022-06-28 13:52:53 UTC::@:[31196]:LOG:  Waiting for runtime initialization complete...
2022-06-28 13:52:54 UTC:[local]:rdsadmin@rdsadmin:[31354]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC::@:[31352]:LOG:  database system was interrupted; last known up at 2022-06-28 13:52:19 UTC
2022-06-28 13:52:54 UTC:10.0.1.31(34296):postgres@postgres:[31353]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34298):postgres@postgres:[31368]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34300):postgres@postgres:[31382]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34302):postgres@postgres:[31386]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34304):postgres@postgres:[31402]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34306):postgres@postgres:[31440]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34308):postgres@postgres:[31448]:FATAL:  the database system is starting up
2022-06-28 13:52:54 UTC:10.0.1.31(34310):postgres@postgres:[31457]:FATAL:  the database system is starting up
2022-06-28 13:52:55 UTC:10.0.1.31(34312):postgres@postgres:[31467]:FATAL:  the database system is starting up
2022-06-28 13:52:55 UTC:10.0.1.31(34314):postgres@postgres:[31478]:FATAL:  the database system is starting up
2022-06-28 13:52:55 UTC::@:[31196]:LOG:  database system is ready to accept connections
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  received SIGHUP, reloading configuration files
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  parameter "unix_socket_permissions" cannot be changed without restarting the server
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  parameter "shared_buffers" cannot be changed without restarting the server
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  parameter "apg_critical_insights_enabled" changed to "on"
2022-06-28 13:55:10 UTC::@:[31196]:LOG:  configuration file "/rdsdbdata/config/postgresql.conf" contains errors; unaffected changes were applied
2022-06-28 13:55:10 UTC::@:[31490]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31486]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31486]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31490]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31262]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31262]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31489]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31489]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31226]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31226]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31485]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31485]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31487]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31487]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31492]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31492]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC::@:[31488]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC::@:[31488]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:10 UTC:10.0.1.31(34600):postgres@postgres:[11434]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:10 UTC:10.0.1.31(34600):postgres@postgres:[11434]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  received SIGHUP, reloading configuration files
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  parameter "unix_socket_permissions" cannot be changed without restarting the server
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  parameter "shared_buffers" cannot be changed without restarting the server
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  parameter "rds.enable_buffer_pin_conflict_forking" changed to "on"
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  parameter "rds.apg_space_reclaim_thread_enabled" changed to "on"
2022-06-28 13:55:30 UTC::@:[31196]:LOG:  configuration file "/rdsdbdata/config/postgresql.conf" contains errors; unaffected changes were applied
2022-06-28 13:55:30 UTC::@:[31262]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31262]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31226]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31226]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31487]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31487]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31488]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31488]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31492]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31492]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31489]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31489]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31485]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31485]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31486]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31486]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC::@:[31490]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC::@:[31490]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"
2022-06-28 13:55:30 UTC:10.0.1.31(34640):postgres@postgres:[12957]:LOG:  skipping missing configuration file "/rdsdbdata/config/recovery.conf"
2022-06-28 13:55:30 UTC:10.0.1.31(34640):postgres@postgres:[12957]:LOG:  skipping missing configuration file "/rdsdbdata/db/postgresql.auto.conf"

テーブル

 321 | 2022-06-28 13:52:39.452956
 322 | 2022-06-28 13:52:40.483377
 323 | 2022-06-28 13:52:41.516449
 324 | 2022-06-28 13:52:42.54735
 325 | 2022-06-28 13:52:43.579139
 326 | 2022-06-28 13:52:44.610785
 327 | 2022-06-28 13:52:45.642509
 328 | 2022-06-28 13:52:46.673966
 329 | 2022-06-28 13:52:47.705797
 330 | 2022-06-28 13:52:48.738429 ★←約10秒弱書き込めていない
 331 | 2022-06-28 13:52:55.153238
 332 | 2022-06-28 13:52:56.194006
 333 | 2022-06-28 13:52:57.228373
 334 | 2022-06-28 13:52:58.263974
 335 | 2022-06-28 13:52:59.317474
 336 | 2022-06-28 13:53:00.347215
 337 | 2022-06-28 13:53:01.379734
 338 | 2022-06-28 13:53:02.417656
 339 | 2022-06-28 13:53:03.451107
 340 | 2022-06-28 13:53:04.487402
 341 | 2022-06-28 13:53:05.522603
 342 | 2022-06-28 13:53:06.554656

Auroraクラスタ側のイベント情報