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Questions tagged [keepalive]

121 questions
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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 be idle for multiple hours! It is not acceptable to…
nik
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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 two. I'm running netstat -plunta to find out the…
Andreas Wederbrand
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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 with the default connection timeout of 2…
dan
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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 routers to call a URL on the internet which I could…
Toby Allen
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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 actually querying a machine with wget from a different…
mit
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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 requests to one server in Y. That would be X…
spencer p
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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 is not available for Solaris at the moment. Is…
fglez
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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 bit without a response (svn update, rsync,…
jmanning2k
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keepalived virtual and real server in different subnets

My goal is to forward the SMTP traffic from one unused server to another using keepalived. The problem is, that the other SMTP server is in different subnet. I have configured keepalive in the following way. virtual_server 192.168.111.111 25 { …
spaceman117X
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nginx detecting dead clients

Normally when you pull the network cable out of a network device (which simulates some drop on the network, so an obscure disconnect), the underlaying sockets do not detect a disconnect (at least our units don't) so we use keep alive to drop…
Lonko
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Keepalived VIP not getting updated MAC after failover

I've got keepalived set up on 2 RHEL7.8 VMs to provide HA for a shared VIP. The VIP works and properly switches to each server when expected. I experience two issues related to the MAC not getting updated. Most often Server2 will become Master and…
el_sea
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Why nginx keepalive_timeout doesn't work?

I have the nginx-server and I need big keepalive_timeout for my api. In nginx.conf I write keepalive_timeout 300; And run apache benchmark test ab -kc 100 -t 30 http://172.16.31.03/ But after 60 second TIME_WAIT connection are closed.
perrfect
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How to determine if I should use KeepAlive in apache?

I have read several posts and questions about KeepAlive but have not found any suitable for me. I have a server with just one client (Trivago) doing hundreds of (hotel availability) requests per second. For each request, I have to request the price…
Hache_raw
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keepalived not promoting BACKUP to MASTER in multi-instance configuration

I'm trying to make a multi-instance keepalived to control a master-replica pair of tarantool servers and setup VIPs. Server state itself is managed outside keepalived. Keepalived should only manage VIPs: it should set VIP1 on dummy1 iface in case…
e-pirate
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Apache2,4 + Prefork + Keep-alive On

I'm trying to speed up a website with a lot of images that are served from a separate subdomain static.example.com (same IP as www.) Using the pingdom tool noticed that first 5-6 requests (on static.example.com) are making full connections…
mj23
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