TTFB, Apache, Seaside Performance Problem

It is hard to guess. Can you try changing the rewrite rules to

RewriteRule ^/rka(.*)$ http://127.0.0.1:8085/RKA/$1 [proxy,last]
RewriteRule ^/hello(.*)$ http://127.0.0.1:8085/HelloWorld/$1 [proxy,last]

It is "127.0.0.1" instead of "localhost"

It is trial and error anyway ;)

Norbert

> Am 05.01.2017 um 12:10 schrieb Sabine Manaa <[hidden email]>:
>
> Hi,
>
> I need the help of the community.
>
> I am not succeding in making our app faster.
> The problem is the Time to first Byte (TTFB). It is always more than one
> second which is much to much.
> We reduced the problem to a *problem between apache and pharo/seaside*.
>

> For this, I have a test application which only renders "hello World". So I

> am sure it is not my code, my database, my css, my js, my ssl.... :-)
>
> I optimized and learned a lot for my app, but it did not solve the TTFB
> problem, which costs 1 additional sec for each click of the user which is
> inaceptable.
>
> Please follow this tests to see the problem:
>
> ===>>> Test 1: test.html without Pharo/seaside
> https://tools.keycdn.com/performance?url=http://app.spesenfuchs.de/test.html
> TTFB in Frankfurt below 10 ms -> this proves that the server and
> configuration is fast.
>
> ===>>> Test 2: hello world, simple seaside page
> https://tools.keycdn.com/performance?url=app.spesenfuchs.de/hello
> TTFB in Frankfurt more than 1 second! -> this proves that it is not my
> application :-) it is only a hello world seaside page...
>
> ===>>> Test 3: my login page
> https://tools.keycdn.com/performance?url=app.spesenfuchs.de/rka
> TTFB in Frankfurt more than 1 second!
>
> (alternative: enter the urls into https://gtmetrix.com/)
>
> In Apache, we enabled tracing of the rewrite and this tells me (i assume),
> that apache makes the rewrite very fast, within the same millisecond :-)
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] init rewrite engine
> with requested uri /hello
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern
> '^/rka(.*)$' to uri '/hello'
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern
> '^/hello(.*)$' to uri '/hello'
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] rewrite '/hello' ->
> 'http://localhost:8085/HelloWorld/'
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] forcing
> proxy-throughput with http://localhost:8085/HelloWorld/
> [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace1] [pid 1288:tid 1692]
> mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - -
> [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] go-ahead with proxy
> request proxy:http://localhost:8085/HelloWorld/ [OK]
>
> So, I assume that there is problem between Apache and Seaside....
>
> My questiond are:  
> what can I do to find the bottleneck?
> what is the reason that is so slow?
> your help is very appreciated because I have run out of ideas what it could
> be and I was investigating it several days now.
>
> Concerning the system:
> The server is at Amazon ec2 windows Server 2009 R2 SP1
> The Apache version is 2.4.23
> The configuration of the apache is like this (as described in the seaside
> book
> http://book.seaside.st/book/advanced/deployment/deployment-apache/configure-apache)
>
> <VirtualHost *:80>
>      ProxyPreserveHost On
>      ServerName app.spesenfuchs.de
>      RewriteEngine On
> <Directory "C:\xampp\htdocs">
>        Require all granted
> </Directory>
>     DocumentRoot "C:\xampp\htdocs"
>     RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
>
>    RewriteRule ^/rka(.*)$ http://localhost:8085/RKA/$1 [proxy,last]
>   RewriteRule ^/hello(.*)$ http://localhost:8085/HelloWorld/$1 [proxy,last]
> </VirtualHost>
>
>
>

> --
> View this message in context: http://forum.world.st/TTFB-Apache-Seaside-Performance-Problem-tp4928839.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>

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