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3
votes
1answer
46 views

Why is my web server dropping connections with a TCP reset at high load?

I have a small VPS setup with nginx. I want to squeeze as much performance as possible out of it, so I've been experimenting with optimization and load testing. I'm using Blitz.io to do load testing ...
-1
votes
0answers
23 views

How to debug high load httpd instances on pretty heavy server [closed]

I have a pretty hefty server with just 5 to max 10 concurrent users online. its a 64gb intel i7 ssd server. i dont understand the high load. i use redis on the server, and pages load within 1.5s. ...
0
votes
3answers
45 views

Kernel Processes Periodically Eating CPU During High Load

I run a production web server with 24 cores in which the work is both CPU and I/O intensive, but mostly CPU. My scripts delay execution when total CPU load is ~85% or higher in order to keep the load ...
0
votes
0answers
16 views

VServer Apache: Is 5s page load normal for ~100 clients?

I administrate a virtual server with 16x Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz with a shitload of 32GiB system memory. The server is used as a web server and has 100 to 150 users at rush hour. In ...
0
votes
1answer
16 views

Find the VirtualHost that got hight traffic from multiple log files

Sometimes my Apache server get high load. I have a lot of VirtualHost, each one having its own log file. The structure is like this /var/www/httpd-logs/virtualhost.com.access.log What command could ...
0
votes
1answer
50 views

Tomcat 8.15 APR Poller failed with error 610,038

I was testing my server with JMeter but when I reach an Highload the server tends to have this error logged on the console and it keeps a lot of active threads on apparent deadlock : 30-Jan-2015 ...
0
votes
0answers
53 views

Bottle neck of nginx?

I'm using nginx as a load balancer on amazon ec2 m3.large instance. This load balancer will receive loads from a load generator and distributed them to the 3 instance with mysql database serves as ...
0
votes
0answers
111 views

High network softirq requests for kernel 3.10 under a lot of traffic

We have been experimenting rolling out 3.10 series kernel that's provided by centos via the centosplus repo for v6. We have been noticing something interesting where under the same load the load for ...
0
votes
1answer
87 views

Choose hardware for MySQL server with 1-2k rps [duplicate]

I am looking for new DB server. I'd like to know your opinions and recommendations. Current server spec: We use DB server for website with 100-200 req per sec(i plan growth up to 200-250) Today we ...
9
votes
4answers
844 views

ps aux hanging on high cpu/IO with java processes

I'm having some issues with java process and nrpe checks. We have some processes that sometimes use 1000% cpu on a 32 core system. The system is pretty responsive until you do a ps aux or try to ...
0
votes
1answer
61 views

Diagnose what is causing Linux system load

I understand that system load is kernel usage such as IO or network. If you don't believe you have high load of either of those two items, what would be some recommended steps to track down what is ...
0
votes
1answer
244 views

Too Many index.php processes with high memory usage

I have wordpress site installed over dedicated server in a separate cpanel account. From couple of days this account experiencing high memory usage, high loadtime and freezing frequently. so I have ...
1
vote
2answers
78 views

How to crash Oracle VM intentionally by loading system parameters

I am using Oracle VM. I want to perform a stress test on system parameters like CPU, RAM etc. Can anyone help me out with the ways in which I can load the parameters with high load like using all the ...
0
votes
2answers
49 views

How to Fix/ solve Very High serverload on Cents os 6 VPS

My VPS is constantly on High Load from last 2 days , cant figure out what the problem is . here are more info about vps. VPS acts as HTTP(Apache), Mysql, Proftp Server, not much traffic., daily approx ...
-1
votes
2answers
777 views

Apache returns default page instead my content

My web site works perfect, but sometimes apache returns default html page: It works! This is the default web page for this server. The web server software is running but no content has been added, ...
9
votes
4answers
1k views

How far is “too far off” for ntpd? Can it get there by a sudden jump to heavy load? Can this be overridden?

In many primers on ntpd, like this one, there's always a warning that ntpd will stop resetting the clock "[if] your clock is too far off." How far off is "too far off"? Also, if a server takes a ...
0
votes
0answers
2k views

High Performance AWS EC2 / RDS + Nginx + PHP-FPM setup

General description of the issue We're currently running an application on a PaaS type solution for PHP. Their solution is based on AWS cloud and due to the fact that their plans don't fit our ...
0
votes
0answers
92 views

high mysqld cpu usage after moving to new server

Just moved to a new (more powerful) server with only one website running on it, no changes on the website, but now I got a horrible high CPU load and I can't find out why. top: top - 22:54:08 up 1 ...
0
votes
0answers
45 views

Cloud load balancers

Can cloud balancers balance HTTP requests coming from a single keep-alive connection? I have 6 machines under LB, and 3 connected clients pumping about 1000 HTTP reqests/second each. I observed that ...
0
votes
1answer
69 views

Strange overload on apache2 web server [closed]

I recently inherited a web server setup from another developer. Its basically the following: 2 web servers running apache 2 2 load balancers running nginx 2 database servers running MySQL Every week ...
1
vote
0answers
221 views

LA problems while serving 40M requests daily with php-fpm, nginx

I have server with FreeBSD (16 cores with HT, SSD, 32Gb RAM) which is getting about 40M http requests daily. All requests are served by nginx + php-fpm. At these graphs you see that we have a ...
0
votes
0answers
51 views

Strange load average behaviour

We have a daemon which collects system data and writes it into database. Sometimes the load average goes very high without apparent reason. Here is sample output. | id | server_id | datetime ...
0
votes
1answer
178 views

CPU load on some apache threads is >10%, other threads are 0.2%

I have an apache box running a WordPress website. For some reason it seems some apache threads are using most of the CPU (10%+), and the remainder little (0.1~). The box is a dual CPU, Intel(R) ...
2
votes
1answer
35 views

Reserve Memory For Shell / Putty To Login When Server Is Overloaded (High Load)

I am currently trying to improve my failover strategies. Aside from adding a DNS failover I want to make sure I am able to log in via a shell Whenever the server is overloaded I am unable to log in ...
1
vote
1answer
192 views

Redundant web static content storage - what technologies? (small scale) [closed]

Current situation of our static web servers: 2x 2U servers full of SSDs (raid5) for storing data data are written to them only through our applications (*) huge amount of small image files (one ...
1
vote
2answers
429 views

System load average is extremely high

I own a website which is running on a VPS since last week. From monday until saturday, everything is going smoothly. The website has around 4.500 unique visitors a day, and the load average and ...
8
votes
4answers
2k views

How to limit number of sessions?

I need a way to track and limit web sessions to a web app. A "session" is loosely defined as the single user browsing the pages of the said web app. I think it can be translated to: a session is ...
0
votes
1answer
485 views

12.04 Migration Process time delay

We have an issue in our server that is the migration process in taking time and also the load in the server is getting high due to that. No LSB modules are available. Distributor ID: Ubuntu ...
0
votes
1answer
59 views

Recording traffic for later replay

In these days we're experiencing huge (based on our recent experience) traffic on our platform, this is slowing us down to a crawl. Today we will probably handle the problem by cutting away a couple ...
0
votes
2answers
1k views

Too many apache processes, killing the CPU

I am noticed that too many apache processes killing the CPU in my dedicated server. 14193 (Trace) (Kill) nobody 0 66.1 0.0 /usr/local/apache/bin/httpd -k start -DSSL 14128 (Trace) (Kill) ...
-1
votes
1answer
52 views

How to increase the default number of Postgres processes?

Disclaimer: I'm relatively new to Postgres. On my production EC2 DB server, I'm experiencing high CPU usage on two of the five CPUs, ultimately resulting in latency for users of my application. I've ...
0
votes
1answer
336 views

Tracing down High Linux Load - HDD at fault or too many interrupts ? (ksoftirqd Time 437:44.13)

Server Stats: "cat /proc/version" Output Linux version 2.6.18-308.24.1.el5 (mockbuild@builder17.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-52)) #1 SMP Tue Dec 4 17:43:34 EST 2012 ...
1
vote
1answer
167 views

Load average 1.00 while top seems to show the server as idle

My server is not responding to HTTP requests, and it took me a long time before being able to log in with SSH; it all looks like the server is overloaded and on its knees. It already did that a few ...
0
votes
1answer
121 views

How to Monitor “NetworkIn” Activity on AWS?

Last night our AWS EC2 Linux Web Server started sending out CloudWatch notices due to high CPUUtilization. We had a normal number of users active, so I am struggling a bit to figure out where the ...
1
vote
3answers
1k views

slow website load and high memory usage

my site has been slowed down last couple of days ... some image doesn't show up ... i got 408 Request Time-out: Server timeout waiting for the HTTP request from the client couple of times which ...
0
votes
0answers
42 views

Apache process 100% with IPV4 TCP 10u

Today i got strange http ussage. All apache processes woks ok but after some time i found few processes stocked at 100% and they are like that long time. After i checked that process id at webmin ...
0
votes
2answers
1k views

High Load, low CPU, Memory and Disk IO - Highend Server

This issue has been bugging me for the past several days having spent over 40 hours investigating this issue intensively. Effectively we run asterisk 1.4.42 which I understand is old, however is the ...
3
votes
1answer
264 views

Is there a backend-aware load balancer for Rails/Passenger?

We have 3 Ruby on Rails applications (A, B and C) installed on a number of application servers. Our front end is HAProxy, backend is Apache + Phusion Passenger. Originally we had all 3 Rails apps ...
1
vote
4answers
669 views

Server Load very high despite CPU usage being low

When I run the top command I get this top - 23:20:50 up 1:25, 1 user, load average: 11.02, 11.20, 10.41 Tasks: 262 total, 3 running, 258 sleeping, 1 stopped, 0 zombie Cpu(s): 75.6%us, ...
1
vote
0answers
110 views

high linux server load

I have a problem with high server load (load average from 10 to 100+) when there is a lot of web traffic. There are also noticable delays when reading/writing files. Machine is a Apache web server. ...
2
votes
2answers
4k views

WHM/CPANEL - High cpu and memory usage from Analog Stats [closed]

A single process is taking 100% of the cpu and 70% of the memory and starts every day on different account; /usr/local/cpanel/3rdparty/bin/analog +CIMAGEDIR /images/ +CDOMAINSFILE ...
2
votes
1answer
1k views

Ubuntu 12.04 KVM host high load with idle ubuntu 12.04 guests

I am stuck with this one. Clean install Ubuntu 12.04 server 64bit on two physical machines. Machines are identical except one has 8GB RAM and the problem machine has 32GB RAM, both machines were ...
1
vote
2answers
1k views

Determine php script causing MySQL huge load

I'm running a young non-profit organization aiming at providing free and low cost web hosting. Since few days, our server load is around 1.5, sometimes raising to 7. top shows me that MySQL is the ...
0
votes
1answer
106 views

Is it worth to set up a different network interface for connections to MySQL?

I have a high load website served by two servers: web server with nginx and php, and database server with mysql. Web server serves all the static content and connects to MySQL and outside world ...
1
vote
1answer
164 views

How to graph the web server load by using the nginx logs with response time?

I want to analyse if certain type of requests do have an important impact on the server. My backend service is behind nginx which logs all requests including the time needed to get the response. Now ...
0
votes
2answers
703 views

Prevent heavy server query to overload Apache/Mysql

I have some questions about understanding high server load and implement some type of load balancing in a common scenario with solutions like Apache and MySQL and PHP 5. I am benninger in the matter ...
6
votes
4answers
5k views

High Load Average with modest CPU Utilization and almost no IO

The usual explanation for high load average with little cpu use under linux is too much IO (or more properly uninterruptable sleep). I have a service running on a cluster of 2-core VMs that exhibit ...
1
vote
1answer
456 views

Linux NIC bonding failure; strange CPU load

Note: An update as been added below I'm having a very strange issue with a Linux server (Debian 6.0.6) using 802.3ad NIC bonding. Occasionally all of the NICs in the bond get marked as down and the ...
0
votes
2answers
149 views

My server crashes and I've checked everything: what's left?

I have an m1.medium Amazon EC2 instance running Apache and hosting a Wordpress blog. In turn, Wordpress works with a MySQL database over on a different EC2 instance. The Wordpress site has W3 Total ...
0
votes
1answer
281 views

Apache compromised now high cpu usage? [duplicate]

Over the weekend one of the virtual servers that I host was compromised and since then I've had all sorts of problems popping up. The latest one is Apache taking 100% cpu usage as soon as it's ...