The keepalive tag has no wiki summary.
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1answer
31 views
How can I avoid heroku stopping my dyno?
I have an application deployed on heroku, and it works like a charm, if not for one little thing. The app takes about 30 seconds to start up and heroku has the annoying habit of killing dyno's if they ...
0
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2answers
79 views
keepAlive in Apache causing apache to reach its max_clients
I have an Apache 2.2 running on ubuntu 11.4 with 16Gb RAM, for image hosting from mobile phones through GPRS,since connection is slow i have enabled keepalive and set time out to 6,**based on average ...
1
vote
1answer
75 views
netstat reports ESTABLISHED connection even after I've pulled the cord
I'm experimenting with lost connections between my java application and my mysql server.
The application and the server are on two different machines and I'm pulling the physical cord between the ...
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1answer
51 views
Keep alive and Max_client issue in Apache
I have installed Apache/2.2.17 on ubuntu 11.4(64bit) ,with 48 GB of RAM, and set
KeepAlive ON
MaxKeepAliveRequests 100
keepalivetimeout to 6 (since lot of dynamic images)
StartServers 100
...
1
vote
1answer
119 views
Is it better to disable Keep-Alive in IIS 7 for high traffic web applications?
The advice below applies to Apache, but it seems generic enough to apply regardless of system. My architecture is 3 web servers behind a load balancer. My IIS servers currently have keep-alive enabled ...
0
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1answer
113 views
Keep-alives are not working for websites with NodeBalancer in Linode
I have following configuration in my linode slice
NB <----->web1+web2+web3
Here's the configuration screenshot from linode:
We need NB in http mode since we need few things that plain tcp mode ...
4
votes
2answers
240 views
What is the difference between keepalive and heartbeat?
I want to structure a high available server cluster . Now I want to know detail about keepalive and heartbeat, what is the difference between both, and How to choice one.
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0answers
182 views
Disable keepalive for proxies
Can I disable keepalive if my site is being accessed through a proxy?
Site is served by nginx on linux, some dynamic parts are proxied to local Apache.
If not possible for all proxies in general, ...
1
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0answers
83 views
A tool to measure overhead of establishing TCP connections
I need a tool which would while doing port forwarding measure how much time was spent establishing TCP connections vs total time passed. Charles debugging proxy has the port forwarding feature and ...
0
votes
2answers
74 views
Is It Better to set KeepAlive to 1 second rather than turning it off all together?
I've heard setting keepalive timeout at too high a number will diminish its value. So, to be on the safe side, and still somewhat benefit from it, can I set it to 1 second ?
Or will setting it to 1 ...
0
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2answers
39 views
Keeping connections open
I'm new to cURL and I'm trying to do something reasonably simple. I want to login to a server and download data at regular intervals over a few hours.
First, I login to the server - which I've ...
1
vote
3answers
49 views
Can I get a router to call a url on a timer?
I am responsible for a small network spread over several buildings. We have accommodation areas that have a router providing access to the internet to guests.
I would love to be able to get the ...
0
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1answer
392 views
How to find the connection time-out value in linux?
I am setting up a nginx webserver with php-fpm and (d)dos deflate to ban attacks.
Now currently there is no traffic to my server at all, as i'm testing things.
With this command i can see who is ...
2
votes
1answer
159 views
Keeping a Python Script alive after leaving SSH Client?
I have a while loop in my Python Script and its independent script so I can't run it as a daemon.
Also I have tryed using nohup, but I'm having this error:
root@ubuntu:~/Desktop/starthere-group-ok# ...
1
vote
1answer
319 views
Keep-alive options not working on Linux for an outgoing connection
Does anyone know if Linux supports keep-alive socket options on an outgoing connection?
I made an outgoing connection with keep-alive options but netstat --timers shows off (I'm assuming timers are ...
1
vote
1answer
966 views
How to adjust nginx keepalive_timeout?
I am using nginx along with php-fpm to server a busy mysql-based site.
Currently I am using keepalive_timeout = 5, however I have no clear idea about how to optimally adjust it. So appreciate your ...
4
votes
2answers
156 views
Impact of Connection Close vs Keep-alive
I'm configuring our servers, and due to the nature of our load balancer, we can't send connection keep-alive headers. I'm trying to determine the impact of sending these headers to both the end-user ...
3
votes
2answers
537 views
keep-alive or not keep-alive
My company is launching a new website with potentially large waves of visitors in very short windows (estimate is around 14k visitors in a 2 minutes window).
So, I'm reviewing our configuration, and ...
0
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1answer
110 views
How to test keep-alive is working on client end
What are some different ways/tools to verify that keep-alive is working on the server from the client's end?
0
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1answer
126 views
Apache Timeout/KeepAlive
I run several apache web servers on CentOS 5.x and they all seem to have the same problem. It is typically fast but at times the browser will just sit there waiting forever and it never fails or goes ...
2
votes
1answer
247 views
HP switch 'mirror port' makes a Cisco switch port err-disabled due to keepalive loop-back
I'm trying to connect an HP ProCurve 5304xl switch to a Cisco 2950. The HP port I'm connecting to is described as a 'mirror port', which appears to be like a SPAN port except that it also allows ...
1
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0answers
238 views
Keep-Alive and Timeout Behaviours between different browsers on Windows
Short Version
Why does chrome send out keep-alive's while IE and FF don't?
Long Version
Initially, I thought this was a server-side issue.
I've got an apache server that's a frontend proxy for a ...
0
votes
1answer
480 views
Is this normal? Multiple httpd process
I'm testing a new Server. This isnt really a peak time for my server (2pm), but still its running a bit slow, I was checking the ESTABLISHED connections using the following command:
# netstat -ntu | ...
0
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1answer
329 views
how do i turn on the Keep Alive and HTTP Compression in Apache server 2.2( centos)
how do I turn on the
KeepAlive and HTTP Compression
in Apache server 2.2(centos)
1
vote
2answers
350 views
TIME_WAIT Info (reduce)
I have a ajax application that makes a request every 3 seconds, the requested page sets the header to (header("Connection: Keep-Alive, close");) then performs a database query and returns the latest ...
0
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1answer
100 views
Load Balanced Apache keeps browser/user on same server until restart
So we have a load balancer setup to pass off our http connections to an array of six servers .. I have disabled KeepAlive and for some reason, only after I restart apache, does my additional ...
0
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1answer
3k views
How to enable `Keep Alive` in a shared hosting environment?
I have only acces to the php.ini file and my good old .htaccess file.
Where do I enable the Keep Alive setting?
( Im on a plesk 8.2 )
1
vote
3answers
170 views
Keeping rackspace vserver alive
It appears to me that rackspace somehow freezes cloud VMs after some idle time. This means the first page request to a php page takes much longer to respond than the subsequent requests.
I am ...
2
votes
1answer
160 views
How do I confirm whether a particular Apache configuration directive is set?
How do I dynamically check/list a particular Apache configuration directive? I know that this can be checked manually from httpd.conf file, but is there any other way this can be confirmed/found from ...
0
votes
2answers
4k views
How do I make cURL use keepalive from the command line?
I'm trying to verify that HTTP persistent connections are being used during communication with a Tomcat webserver I've got running. Currently, I can retrieve a resource on my server from a browser ...
1
vote
4answers
2k views
What alternative is there to Nginx that supports http keep-alive between backends?
I recently asked a question about how to keep a backend connection persistent using Nginx, but found out it wasn't possible anyway,
It is an HTTP/1.0 proxy without the ability for keep-alive ...
1
vote
1answer
377 views
Pros and Cons of Keep-Alive from Web Server Side
Keep-Alive connection feature in HTTP protocol is meant to reduce TCP connection hits to web server. It should be able to improve web server performance. However, I found that some web servers ...
1
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2answers
83 views
Funnelling http traffic
I have a situation where a large batch of servers (X), on demand, need to request data from a smaller set of web servers (Y).
The worst case scenario is if all servers in X decide to fetch different ...
0
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1answer
1k views
Keep-Alive header not sent from Tomcat 5.5 http connector?
We're currently using a hardware load balancer, which then goes to Apache and that then goes to Tomcat 5.5 via the AJP connector.
We've decided to dump apache for various reasons - In our current ...
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2answers
519 views
How to know the source of certain TCP traffic on AIX
We have two AIX boxes, one for production system and another for testing.
both systems are running ATM machine switches, where the ATM device is connected via TCP socket.
we had an issue on ...
0
votes
1answer
588 views
Keepalived alternative for Solaris 10
We are considering an architecture like the one in the picture for Solaris 10
That is, high avalaibility software load balancers in front of web and application servers.
Unfortunately, Keepalived ...
5
votes
2answers
3k views
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3answers
151 views
How to make Apache keep the connection after the request is finished?
So that subsequent request can still use the current connection.
1
vote
3answers
1k views
How can I measure TCP timeout limit on NAT firewall for setting keepalive interval?
A new (NAT) firewall appliance was recently installed at $WORK. Since then, I'm getting many network timeouts and interruptions, especially for operations which would require the server to think for a ...
2
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2answers
3k views
Apache - keep-alive or not keep-alive?
According to Methods and Best Practices for High Performance eCommerce with the Magento Enterprise Edition (registration required) keep alive should be off (for high traffic sites)
mod_qos can also ...
8
votes
3answers
5k views
should I activate keepAlive in apache2
In any default installation, Apache 2 comes with keepAlive off, but looking at another server with Cpanel installed, the keepAlive module was turned on. Also in ISPconfig.
So, how do I know if ...
0
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1answer
1k views
Why aren't connections released by the tomcat AJP connector
I have here a jboss with a web application. The tomcat is configured to use the ajp connector.
Incoming connections are tunneled via an apache reverse proxy to the connector.
Now I recognized that ...
1
vote
3answers
972 views
IIS stops responding
I'm using IIS (on Windows 2003) and have placed a dummy.html in my default web site. The file is empty.
I'm using wfuzz to access this file a large number of times (wfuzz does HTTP requests), with ...
0
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3answers
799 views
Graceful Apache restart and Keep-Alive connections
I am trying to find a way to quickly restart Apache to apply configuration changes. The goal is to:
Restart without distributing currently processed requests
Do this as atomically as possible, i.e. ...
2
votes
1answer
5k views
Enabling system wide TCP keepalives on a Windows system
Can I change/add the KeepAliveTime and related registry variables to make a Windows machine send TCP keepalive packets on an idle connection?
I want to know if anyone has successfully got this ...
0
votes
2answers
2k views
Configuring keepalives with TOAD client communication
I have a scenario where long-idle sessions of TOADSoft client communication with the Oracle server seem to be torn down as they timeout on an intermediate state-full firewall.
These sessions could ...
