2019-03-31 11:00:21 +00:00
---
title: 今度はボットが襲来しました
2021-02-27 13:04:45 +00:00
date: 2015-01-26T15:04:05Z
2021-11-13 03:11:49 +00:00
author: kazu634
2019-03-31 11:00:21 +00:00
categories:
2021-02-27 12:05:32 +00:00
- Labs
- Infra
- Monitoring
tags:
- troubleshooting
2019-03-31 11:00:21 +00:00
---
< a href = "https://www.flickr.com/photos/nukamari/8199540353" onclick = "__gaTracker('send', 'event', 'outbound-article', 'https://www.flickr.com/photos/nukamari/8199540353', '');" title = "Long Live Rock 'n' Roll by Nukamari, on Flickr" > < img class = " aligncenter" src = "https://farm9.staticflickr.com/8057/8199540353_d0ef418eea.jpg" alt = "Long Live Rock 'n' Roll" width = "500" height = "332" / > < / a >
今度はボットくんが襲来してきました。サーバーのリソース使用状況が異なるので、メモとして貼りつけておきますね。まずはアクセス数から:
< a href = "https://www.flickr.com/photos/42332031@N02/16186765529" onclick = "__gaTracker('send', 'event', 'outbound-article', 'https://www.flickr.com/photos/42332031@N02/16186765529', '');" title = "access by Kazuhiro MUSASHI, on Flickr" > < img class = " aligncenter" src = "https://farm8.staticflickr.com/7368/16186765529_5d7160934e.jpg" alt = "access" width = "465" height = "205" / > < / a >
次はレスポンスタイムです。ブルートフォースアタックの時は、ログインページにのみのアクセスだったため、ほとんど500ms以内のレスポンスタイムでしたが、ボットのアクセスは網羅的で、キャッシュに載っていないページは生成処理が入るため、一部でレスポンスタイムが悪化しているみたいです:
< a href = "https://www.flickr.com/photos/42332031@N02/16371262121" onclick = "__gaTracker('send', 'event', 'outbound-article', 'https://www.flickr.com/photos/42332031@N02/16371262121', '');" title = "response_percent by Kazuhiro MUSASHI, on Flickr" > < img class = " aligncenter" src = "https://farm8.staticflickr.com/7414/16371262121_9203d6f21b.jpg" alt = "response_percent" width = "464" height = "329" / > < / a >
Load Averageはこちら:
< a href = "https://www.flickr.com/photos/42332031@N02/16372989905" onclick = "__gaTracker('send', 'event', 'outbound-article', 'https://www.flickr.com/photos/42332031@N02/16372989905', '');" title = "load_avg by Kazuhiro MUSASHI, on Flickr" > < img class = " aligncenter" src = "https://farm8.staticflickr.com/7436/16372989905_90b2fa22c5.jpg" alt = "load_avg" width = "465" height = "218" / > < / a >
CPU使用率です。やっぱり、キャッシュに載っていないページを生成する際は、瞬間的にUserの割合が高くなってしまうようです。逆にキャッシュに乗っているページを応答する場合は、ほとんどCPUを使用せずに処理できていることもわかります:
2019-04-02 16:06:15 +00:00
< a href = "https://www.flickr.com/photos/42332031@N02/16185349948" onclick = "__gaTracker('send', 'event', 'outbound-article', 'https://www.flickr.com/photos/42332031@N02/16185349948', '');" title = "cpu by Kazuhiro MUSASHI, on Flickr" > < img class = " aligncenter" src = "https://farm8.staticflickr.com/7357/16185349948_3900d9de25.jpg" alt = "cpu" width = "465" height = "301" / > < / a >
