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Bug #82323

closed

Typo3 8 forces HTTP keep-alive even for HTTP/1.0 clients without 'Connection: Keep-Alive' header

Added by Danilo Godec almost 7 years ago. Updated almost 5 years ago.

Status:
Rejected
Priority:
Should have
Assignee:
-
Category:
Performance
Target version:
-
Start date:
2017-09-07
Due date:
% Done:

0%

Estimated time:
TYPO3 Version:
8
PHP Version:
7.0
Tags:
Keep-Alive Connection
Complexity:
Is Regression:
Sprint Focus:

Description

We wanted to do bench-marking with Apache's 'ab' tool and noticed that unless we use explicitly use 'keep-alive' (ab -k), results are really bad:

> ab -n1 -c1 -v4 http://typo8.example.com/
This is ApacheBench, Version 2.3 <$Revision: 1748469 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking typo8.example.com (be patient)...INFO: GET header ==
---
GET / HTTP/1.0     <---------------- since 'ab' uses HTTP/1.0, Keep-Alive should not be the default
Host: typo8.example.com
User-Agent: ApacheBench/2.3
Accept: */*

---
LOG: header received:
HTTP/1.1 200 OK
Date: Thu, 07 Sep 2017 07:23:05 GMT
Server: Apache
X-Powered-By: PHP/7.0.7
Content-Language: en
Expires: Fri, 08 Sep 2017 07:03:31 GMT
Cache-Control: max-age=85226
Pragma: public
Content-Length: 15117
X-FRAME-OPTIONS: SAMEORIGIN, SAMEORIGIN, SAMEORIGIN, SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-UA-Compatible: IE=edge
X-Content-Type-Options: nosniff
Content-Type: text/html; charset=utf-8

<!DOCTYPE html>
... HTML body removed for brevity ...

LOG: Response code = 200
..done

Server Software:        Apache
Server Hostname:        typo8.example.com
Server Port:            80

Document Path:          /
Document Length:        15117 bytes

Concurrency Level:      1
Time taken for tests:   15.135 seconds   <------ 15 seconds
Complete requests:      1
Failed requests:        0
Total transferred:      15542 bytes
HTML transferred:       15117 bytes
Requests per second:    0.07 [#/sec] (mean)  <--- really bad requests per second
Time per request:       15135.477 [ms] (mean)
Time per request:       15135.477 [ms] (mean, across all concurrent requests)
Transfer rate:          1.00 [Kbytes/sec] received

Using 'telnet' to server port 80, we found out that after Typo3 returns HTML body, the server keeps the connection open for another 'KeepAliveTimeout' period (in this case 15 seconds) - which may be 'normal' for HTTP/1.1 where Keep-Alive is the default, but should not happen with HTTP/1.0 (which is what 'ab' uses).

This does not happen if we connect to static HTML file or a simple 'Hello World' PHP script:

> ab -n1 -c1 -v4 http://typo8.example.com/test.php
This is ApacheBench, Version 2.3 <$Revision: 1748469 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking typo8.example.com (be patient)...INFO: GET header == 
---
GET /test.php HTTP/1.0
Host: typo8.example.com
User-Agent: ApacheBench/2.3
Accept: */*

---
LOG: header received:
HTTP/1.1 200 OK
Date: Thu, 07 Sep 2017 07:28:57 GMT
Server: Apache
X-Powered-By: PHP/7.0.7
Cache-Control: max-age=0
Expires: Thu, 07 Sep 2017 07:28:57 GMT
X-FRAME-OPTIONS: SAMEORIGIN, SAMEORIGIN, SAMEORIGIN, SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-UA-Compatible: IE=edge
X-Content-Type-Options: nosniff
Content-Length: 13
Connection: close
Content-Type: text/html; charset=UTF-8

Hello World  
LOG: Response code = 200
..done

Server Software:        Apache
Server Hostname:        typo8.example.com
Server Port:            80

Document Path:          /test.php
Document Length:        13 bytes

Concurrency Level:      1
Time taken for tests:   0.006 seconds
Complete requests:      1
Failed requests:        0
Total transferred:      412 bytes
HTML transferred:       13 bytes
Requests per second:    166.72 [#/sec] (mean)
Time per request:       5.998 [ms] (mean)
Time per request:       5.998 [ms] (mean, across all concurrent requests)
Transfer rate:          67.08 [Kbytes/sec] received

Since this only happens if we access Typo3 8 and not with older Typo3 versions (we tested 6.2), a simple 'test.php' or a static HTML files (all on the same Apache / PHP server), we believe the issue is with Typo3 8.

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