The high-load tag has no wiki summary.
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0answers
21 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 ...
0
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0answers
32 views
cassandra compaction high load
Since last night I am seeing CPU load spikes on our cassandra boxes(Occasionally load goes up to 20, its a Amazon EC2 c1.xlarge with 300 iops EBS). After digging around a little I believe its related ...
1
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2answers
51 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 ...
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1answer
44 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 ...
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0answers
25 views
vmstat - context switches ok? [closed]
I am rather new to this tool and server optimization so my eye is not trained yet. Could someone give me a reading of these stats output by vmstat and let me know whether the context switches (or ...
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0answers
27 views
DRBD + OCFS2 high load when copying. Troubleshooting?
I have a dual primary DRBD + OCFS2 setup for web serving and generally it works very nicely.
I can however get the load to spike to 40 - 50+ by say extracting a large tar file or rsyncing several ...
1
vote
1answer
54 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
186 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 ...
4
votes
3answers
357 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 ...
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0answers
39 views
Weird issue - websites on SSL load normally during high loads?
Sort of a strange question, but what is the difference between SSL (https) and non-SSL (http) websites when there is a high load on the server?
I actually encounter high loads from time to time, a ...
1
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0answers
176 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
1answer
396 views
GlusterFs - high load 90-107% CPU
I try and try and try to performance and fix problem with gluster, i try all. I served on gluster webpages, php files, images etc. I have problem after update from 3.3.0 to 3.3.1. I try 3.4 when i ...
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2answers
61 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
163 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 ...
1
vote
1answer
318 views
High server load - [jbd2/md1-8] using 99.99% IO
I've been having spike in load over the last week. This usually occurs once or twice a day. I've managed to identify from iotop that [jbd2/md1-8] is using 99.99 % IO. During the high load times there ...
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votes
1answer
72 views
How to track traffic tidal wave on Amazon EC2 instance? [duplicate]
I have an Amazon EC2 web server that talks to a second database server instance... the web site is for a TV show, so the site tends to run a normal load of traffic until it's mentioned on the air and ...
-3
votes
1answer
84 views
Why my Apache Server Load is very high? [closed]
I have a Apache server running php website, the following is the System information
PHP Handler: FastCGI
Server load 3.8 (4 CPUs)
Memory Used 17.48% (725,720 of 4,151,400)
Swap Used 5.97% ...
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0answers
22 views
How do we configure Lustre to block client requests when under load, rather than failing?
We are using Lustre in a cluster with approximately 200TB of storage, 12 Object Storage Targets (that connect to a DDN storage system using QDR Infiniband), and roughly 160 quad and 8-core compute ...
1
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4answers
171 views
Linux high load with ImageMagick convert utility and server freezes (blktrack output attached)
I'm using ImageMagick to convert a JPG to TIF file, and I'm using the limit options for Imagemagick as below:
/usr/bin/convert -limit memory 256 -limit map 512 subjectfile.jpg -colorspace Gray -depth ...
0
votes
1answer
122 views
CentOS server high load and server freezes
My server seems to get sudden high loads within second and when I run dmesg, following logs appear:
INFO: task auditd:2185 blocked for more than 120 seconds.
"echo 0 > ...
0
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0answers
37 views
High load cause? [duplicate]
Possible Duplicate:
what is my server high load cause (4 cores and 8 thread cpu)
What is my high load cause?
CPU,RAM or IO?
4 Core, 8 thread cpu
top - 22:27:07 up 149 days, 5:26, 1 ...
0
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0answers
99 views
High Load Average and High CPU usage make the CRM Slow
top:
12:49:59 up 49 days, 14:07, 3 users, load average: 7.55, 7.24, 7.37
Tasks: 300 total, 25 running, 263 sleeping, 0 stopped, 12 zombie
Cpu(s): 91.9%us, 8.1%sy, 0.0%ni, 0.0%id, 0.0%wa, ...
9
votes
3answers
452 views
Load avg weirdness on Linux Ubuntu
In past few days I've been trying to understand the weirdness which is happening in our infrastructure but I haven't been able to figure it our so I'm turning to you guys to give me some hints.
I've ...
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votes
4answers
224 views
what is my server high load cause (4 cores and 8 thread cpu)
What should i do if I want to prevent this high load.
My website becomes slow when load is higher than 8.
Please see iotop result too.
top - 20:23:10 up 127 days, 3:22, 1 user, load average: ...
1
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1answer
197 views
How to choose a correct value for open_file_cache in nginx configuration?
I have a website with load of about 60 000 requests per minute served by nginx. Recently, I have enabled the open file cache and saw a dramatic improvement in performance. But in the evenenings, when ...
2
votes
3answers
300 views
Nginx and php-fpm fails with high load: “Possible SYN flooding on port 80” and “104: Connection reset by peer”
I have quite heavy loaded web server using:
Ubuntu server
nginx
php-fpm + apc
Yesterday something wierd happened with my server. It crashed and stopped responding and after I rebooted it, web pages ...
4
votes
2answers
164 views
High Server Load cannot figure out why [closed]
My server is currently running CentOS 5.2, with WHM 11.34.
Currently, we're at 6.43 to 12 for a load average. The sites that we're hosting are taking a lot time to respond and resolve. top doesn't ...
1
vote
1answer
113 views
HA Proxy - roundrobin vs leastconn
Are there any suggestion on when should I use roundrobin & when should I use leastconn?
I am using roundrobin currently and observed the loading of my back-end servesr are not evenly ...
0
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0answers
142 views
High Load average in Linux kernel 2.6.26 even cpu time is available?
I have 2 machine. both the machine I have kernal 2.6.26.
Both machines are getting more then 300 load averages even cpu idle time is 80%-90%.
In the wa column also very less.
The followings are top ...
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0answers
217 views
Linux Tuning for High Traffic JBoss Server with LDAP Binds [closed]
I'm configuring a high traffic Linux server (RedHat) and running into a limit I haven't been able to track down. I need to be able to handle sustained 300 requests per second throughput using Nginx ...
1
vote
1answer
98 views
How to trigger killing of apache child processes on higher system load?
I'm having a Debian with WordPress on Apache, which gets pretty nasty spikes in load from time to time, leading to hanging on of the whole server. I've played a bit with some of the apache ...
4
votes
1answer
564 views
High load average due to high system cpu load (%sys)
We have server with high traffic website.
Recently we moved from
2 x 4 core server (8 cores in /proc/cpuinfo), 32 GB RAM, running CentOS 5.x, to
2 x 4 core server (16 cores in /proc/cpuinfo), 32 GB ...
3
votes
2answers
452 views
CPU0 is swamped with eth1 interrupts
I've got an Ubuntu VM, running inside Ubuntu-based Xen XCP. It hosts a custom FCGI-based HTTP service, behind nginx.
Under load from ab the first CPU core is saturated, and the rest is under-loaded.
...
3
votes
2answers
186 views
Uneven CPU core utilization
tl;dr: First CPU core is consistently saturated, all other cores are consistently under-loaded.
A VM, inside Ubuntu-based Xen XCP:
$ uname -a
Linux MYHOST 2.6.38-15-virtual #59-Ubuntu SMP Fri Apr ...
0
votes
2answers
108 views
How to choose NoSQL database engine?
We have a database with following specs:
30k records, 7mb in size
20 inserts/second
1000 updates/second
1000 range selects/second, by secondary index, approx 10 rows each
needs at least one ...
0
votes
2answers
314 views
How to reduce server load without killing processes?
I am running a CentOS 6 VPS with WHM/cPanel. I am trying to move some accounts, to reduce load, so I have to run /scripts/pkgacct, however the gzip and other processes run by this script cause a very ...
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0answers
87 views
VPNC eats 100% CPU and strange output by strace
top - 21:02:03 up 28 days, 7:34, 1 user, load average: 1.00, 1.01, 1.05
Tasks: 95 total, 2 running, 93 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.4%us, 13.8%sy, 0.0%ni, 81.6%id, 3.2%wa, ...
1
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0answers
37 views
Most scalable way of serving a small set of static HTTP content [closed]
The story: Hi guys. I'm among the people responsible for serving the results of the most anticipated (by number of people participating) annual entrance exam in my state. As such, when our results are ...
1
vote
1answer
99 views
Extremely high loads despite Caching
Okay I've got a nice dedicated server running CentOs 6 with 16gb of ram, dual xenon processors, etc. However I've been experiencing high loads due to mysql. Randomly the load will go below 1.0, and ...
2
votes
1answer
485 views
ksoftirqd hitting 100% on interface with ixgbe driver
This is my driver information.
ethtool -i ethXX
driver: ixgbe
version: 3.9.15-NAPI
firmware-version: 0x800000a5
bus-info: 0000:04:00.0
supports-statistics: yes
supports-test: yes
...
3
votes
1answer
46 views
Perform action based on load avg
I'm running some web applications on an debian server and have to struggle with ddos attacks sometimes. It's eating up all my resources and I can't ssh anymore into the server.
An idea was to drop all ...
0
votes
1answer
155 views
Would Sphinx be a good solution to solve server getting bogged with heavy MySQL reads?
I'm working on a site that I believe gets about 70k visits a day and it makes use of a lot of queries which uses UNION's over about 45 different tables, these tables generally range from about 15k ...
1
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2answers
685 views
Very high load, apparently caused by pdflush
I have a server that's running CentOS 5, and it will periodically (a couple of times a day) have enormous spikes in load, and the whole server will grind to a halt. After a couple of minutes, the load ...
8
votes
1answer
765 views
high load average, high wait, dmesg raid error messages (debian nfs server)
Debian 6 on HP proliant (2 CPU) with raid (2*1.5T RAID1 + 2*2T RAID1 joined RAID0 to make 3.5T) running mainly nfs & imapd (plus samba for windows share & local www for previewing web pages); ...
0
votes
1answer
58 views
What is the standard way of providing a servery busy lockout page when server is overloaded?
We have the need to lockout users from our service when its under load to avoid degraded user experience. We have implemented a very rough and ready version of this by detecting errors or timeouts on ...
-3
votes
1answer
95 views
How to read network card specs [closed]
i am in the need of buying a rack server which will serve static video files to users. Each video file will be between 30MB and 50MB and we expect up to 16k concurrent users. I was looking for servers ...
0
votes
1answer
1k views
How to know which site/script is taking all CPU and RAM in Plesk/apache
I have more than 100+ domains on a CentOS Plesk server. Suddenly the load on the server goes very high and eats up all resources. eating up all RAM, all CPU , due to which i cannot even login to ...
1
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3answers
769 views
No apparent reason for high load average
We have several web servers running on Amazon (ec2) c1.xlarge, over Amazon AMI.
The servers are duplicates of each other, running the exact same hardware and software.
Each server spec is:
7 GB of ...
0
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0answers
142 views
“iostat” command different in two equal machines
We have several machines on Amazon (ec2) of the type c1.xlarge with 8 cpus, running the Amazon AMI.
Details on the machine:
7 GB of memory
20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute ...
1
vote
2answers
309 views
No clue for high load average on top
We have several machines on Amazon (ec2) of the type c1.xlarge with 16 cpus, running the Amazon AMI.
Details on the machine:
7 GB of memory
20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute ...
