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0
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1answer
172 views

2x uplinks in HSRP - how to setup switch?

Our ISP provides us with 2x 10G uplinks, and they use HSRP on their end. We see incoming traffic (load balanced) on both ports, but outgoing from us is only via one port. We only run L2 on our side ...
0
votes
1answer
401 views

High ping times and packet loss on Alcatel-Lucent OmniSwitch 9600

We have 2 Alcatel 9600 core switches in a redundant configuration and 2 distribution switches (Alcatel 6850's) on another floor connected by fibre to the core switches. See the diagram below. Pinging ...
0
votes
1answer
674 views

Nginx + php-fcgi website loads 4-5 seconds, slow issue

My website started loading for like 4-5 seconds (in peak hours) - it is almost not usable. Traffic: 40MB/s out, 6MB/s in. (almost 95% of out is downloading files 0.5-2GB large). Over 100 simultaneous ...
0
votes
1answer
540 views

After Mavericks upgrade problems with PHPStorm [closed]

I upgraded to Mac OS Mavericks and since then my PHPStorm caused problems. During typing inside the editor the CPU goes up to 400% and the typing lags. I didn't know what to do or what the reason is. ...
0
votes
1answer
753 views

Slow http responses

I am running an apache web server on debian 6.0 with kernel 2.6.32-5-amd64. In certain times of the day, usually when more people are online, the server have very slow responses. I am sure, that is ...
1
vote
1answer
143 views

Debian 7 - Disk lag when copying files [closed]

I'm hosting multiple game servers on a machine with Debian 7 and after a game server is created, a new game folder is extracted with the game files on it, which involves copying around 2-4 GB, and ...
2
votes
2answers
1k views

Stacking and LAGing 4x PowerConnect 8024F's

We are constructing a new networking infrastructure to replace out 1GbE backbone and have decided upon using 4x Dell PowerConnect 8024F's as our "core" switches. As per the diagram below we have 2x ...
8
votes
1answer
4k views

Layer 2 Loop Avoidance: Three Switches in Series

I know this seems like a homework question, but it's actually part of a larger project (and network) and need to break it down into chunks so I'm clear with what I'm doing. I've never worked with ...
1
vote
1answer
194 views

Netgear XSM7224S / DLink 1210-48 Static Lag (Trunk Failure)!

I need to configure a Netgear Switch(XSM7224S) and DLink Switch (DL1210-48) with two trunk ports. I did the same and created a lag (static) between them, afterwhcih a reboot was performed on both of ...
0
votes
1answer
1k views

MySQL replication lag increasing

I have simple master-slave replication setup. Everything worked with no problems for more than a year. Few days ago replication lag started to rise and it's still rising with no obvious reason. ...
5
votes
2answers
1k views

Laggy server, seems iptables is doing the load

I added a few thousand IPs packed in multiple /24 classes to a CentOS box and because of that I am getting scanned day and night. Since this server will be a workhorse and it will only need to be ...
4
votes
1answer
529 views

MongoDB Replica-Set with Replication Lag on one node only

we experience a strange behaviour in our MongoDB Replica-Set, setup of 3 Nodes (all Xeon Quad-Core-Class CPUs, 16GB of RAM for one, 24GB for the other two nodes) The one node with less RAM is normal ...
0
votes
1answer
83 views

Artificially degrade apache2 performance to meet real world conditions

I want to degrade my apache2 development server performance (it's on a local network) to simulate real world conditions (lag, slow connections, random timeouts...). Is there any apache mod to do ...
2
votes
3answers
134 views

Copying Files Gives Disk Lag

I have some Game Server services running on my Debian 6.0 64-bit Custom Kernel machine. I lag on my currently running services whenever I install a new service. Installing a new service just ...
3
votes
4answers
9k views

Link bonding across multiple switches?

I've read up a little bit on bonding nics with ifenslave; what I'm having trouble understanding is whether there is special configuration needed in order to split the bonds across two switches. For ...
0
votes
1answer
187 views

Dos/ Flood Lag even though Port not Saturated

My GameServers had been under some UDP Floods due to which they generated outputs to the attacker which gave the GameServers some huge lags. Thanks to friends at ServerFault that upon different kind ...
2
votes
2answers
182 views

Diagnosing Random Network Lag

I'm having trouble diagnosing some random lag on a 6 server LAMP cluster serving a MediaWiki site. While we're serving some 100 pages/sec the servers themselves are running fine with less than 0.5 ...
0
votes
2answers
257 views

40 tcp clients simultaneously - extreme lag

I own a dedicated server at nuxit, which "guarantees" a 20mb connection. I run a game server there which i have programmed myself in java. The game does not consume a lot of memory/cpu/bandwith ...
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vote
4answers
1k views

Basic traceroute question - good traceroute, but connection times out?

Basic question: if I get a decent ping between hops in a traceroute reading, BUT I'm unable to connect to the host via FTP, what does that imply? By connecting via FTP, I simply mean using FileZilla ...
2
votes
1answer
695 views

How to diagnose lag problem with 502 errors (linux, apache)?

For the past few weeks I've been getting more and more reports about lag on one of my sites. I've finally been experiencing it first hand over the last week, but I haven't been able to pinpoint the ...
0
votes
1answer
1k views

Link Aggregation between DELL PC2724 and Cisco Catalyst 3750

I'm trying to configure Link Aggregation between my two switches, on the DELL switch, there is only an option to include a port in a "LAG Group." On the Cisco's I've tried creating an EtherChannel ...
1
vote
1answer
886 views

How can I Identify Cause of Slow Image Loading in IIS?

Please excuse if this question isn't as clear as it should be, but I'm a Dev (not a System Administrator) who is trying to help out with an issue we're seeing. We just migrated the hosting of our ...
0
votes
1answer
518 views

Random Lag in Apache before serving files

I've been trying to troubleshoot some random lag that happens in less than 3% of requests I'm sending to my server. I wrote a testing script that uses PHP's file_get_contents on a seperate server and ...
1
vote
3answers
1k views

web application lag when connecting to VPN database

I have a network traffic question, that I may get a lot of answers for. At work, I'm VPNing to a client's internal network where they have their stage SQL database. Every time I stage development ...
0
votes
2answers
122 views

How to diagnose networking lags using Windows on colocation?

I have W2008 R2 server on colocation. I am getting weird cyclical lags - several times a minute latency jumps and then gradually drops back. I can tell becuase the service I consume sends me local ...
2
votes
1answer
5k views

Static LAG and VLAN Trunking Differences?

What is the difference between Static LAG and VLAN Trunking and which would be better to use going from Switch to Switch with CAT5 in a VLAN environment?
3
votes
4answers
255 views

Downloading a file brings network to a crawl

I'm an IT assistant and am attempting a download of CentOS for a webserver. It's a 3.9 gig DVD ISO and whenever I start the download, or any download for that matter, it will max out at 300kbps, seems ...
0
votes
1answer
1k views

Nginx Static Content Server Maxing Out?

I use nginx to serve the static content for a decently busy website of mine. I have the logging disabled, and 4 worker processes enabled with 5,000 connections per worker (which should yield a max ...
5
votes
4answers
3k views

mysql connection is slow (5seconds)

After building my webapp on a first boot i create 2 connections to mysql on debian then 1-2 (r/w) for every page after that. The connection consistently take 5.2 seconds to connect. Debian is in a VM ...
2
votes
1answer
248 views

Load is 0, yet site crawls (sometimes). What gives?

I have a ~1.5-2mil page views per day site running on 2 servers. One for mysql, other for everything else. Mysql box has a load of 3, frontend is usually 0.0-0.1. Both are dual quad core with 8GB ram ...