Questions about server hardware and software performance, or network performance.
0
votes
0answers
15 views
RAM Disk software (many of them) have slow speed with small files [closed]
We need to find a good RAM disk software for using it with MS Analysis Services Multidimensional (to put some cubes with recent data - 2-3 month, and to speed up the data retrieval with MDX queries). ...
-2
votes
0answers
28 views
A .NET Windows service and it's performance on a virtual server versus physical server [closed]
We currently run a .NET Windows service on a Windows 2008 R2 server which is virtualized in a VMware ESX environment.
I have noticed that, even when there is minimal, yet none activity whatsoever on ...
0
votes
2answers
17 views
Postfix time in queue manager very high
http://screencast.com/t/7Ok2PwDDj
I have been running Postfix 2.6.6 for the last 5 months. There has not been any server changes and the config allowed me to send 150,000 emails per hour with no ...
0
votes
1answer
21 views
ASP.net site on IIS7 - intermittently very slow on all remote connections, but always very fast locally
One of our asp.net sites is intermittently very slow when accessed from the Internet. But even when very slow remotely, it is still running very quickly when accessed on Remote Desktop from the server ...
-2
votes
0answers
20 views
When starting a redhat guest in kvm context switching becomes very high
On a CentOS 6 I start a RedHat 5 guest which is quite idle. The guest is quite idle but the host immediately has context switching becoming very high.
If I launch many processor (not disk) consuming ...
-1
votes
1answer
14 views
How to measure performance for a download behind a proxy
I would like to measure the download performance of my company's proxies.
Browsing could take ages whereas my company has two redundant high speed internet access (2 x 100MB/s) and it seems that the ...
0
votes
1answer
29 views
Any possible side effect to use APC on shared host? [closed]
I'm using a shared host for a CMS site. This shared host has an option to use "APC".
I just tried this option on a test site as it can be enabled just by one click on my account page of the shared ...
1
vote
1answer
34 views
IIS site slows down even though there is lots of CPU and RAM left? speeds up if users are split
I have a .net web application on IIS and the site was running very slow(on AWS EC2 medium server 2012). CPU usage and RAM usage are both down very low.
I started up another EC2(medium server 2008) ...
0
votes
0answers
18 views
Mysql Server Performance Hit from Triggers
I have 50 databases on a reasonably spec'd Debian MySQL Server v5.1.63 The size of these database vary from about 3MB -> 7GB each.
Each database has a history database and most( but not all) tables ...
-1
votes
1answer
20 views
SSL secured account section, Subdirectory vs Subdomain [closed]
I'm currently running Drupal on an nginx server, and I also have a separate user account system running on account.domain.com. I purchased a wildcard SSL certificate to protect the login form, but the ...
0
votes
0answers
35 views
Amazon vs Owned Hosting: Performance [duplicate]
Disclaimer: I am not an Amazon aficionado by any means. My background is in mostly "traditional" system deployments as opposed to any cloud technologies. Also, this is not a "shopping" question - I am ...
0
votes
3answers
54 views
Increasing vCPUs for Server 2003?
I have a VM running Server 2003 and SQL Server 2008 on VMware ESXi. Can I safely assume this configuration can cope with a change to the number of vCPUs? Are there better solutions to address the ...
0
votes
0answers
26 views
Apache performance too slow [duplicate]
I spent the last 3 days trying to optimize my apache server running on an ubuntu server with 64G RAM. I created an index.php containing only <?php echo 'hi'?> for testing purposes. But I still ...
2
votes
1answer
25 views
IIS 7.5 + Classic ASP + Forms Auth = memory leak?
When I implement the section titled "TAKING ADVANTAGE OF THE INTEGRATED PIPELINE" from the document below, memory usage counters for the w3wp.exe process increases with request to the classic asp test ...
0
votes
0answers
12 views
Optimize monothreaded application under XEN
I have an single threaded application who uses 100% cpu on virtual machine under XEN.
Adding more VCPU will not help. Is it possible to configure XEN VCPU in order to have better performance with ...
1
vote
2answers
58 views
Are ext4 RAID5 tuning options useful under LVM?
I'm setting up a system with a system with a mdadm RAID5 which is the sole PV for a VG which hosts 4 LVs.
When I make the filesystem, would the mkfs.ext4 -E option be useful? Or is its effect not ...
1
vote
3answers
38 views
High await in sar
My database server has the following sar output for the data device:
[postgres@dbsrv07 ~]$ LC_ALL=POSIX sar -d |egrep "await|dev253-2"
00:00:01 DEV tps rd_sec/s wr_sec/s avgrq-sz ...
0
votes
2answers
51 views
Why is G-Wan performance so low on Opteron?
I am testing G-Wan 4.3.14 on CentOS 6 with the 2.6.32 Linux kernel using an Opteron 6234 6 module / 12 core processor.
Running a simple weighttp test I get:
weighttp -k -n 1000000 -t 6 -c 1000 ...
0
votes
0answers
31 views
Best config for MySQL performance with medium to small queries with lots of power [duplicate]
I want to make our web-server perform the fastest possible and one of the main bottlenecks I see is MySQL. The software we're using is not developed by us and therefore we do not have control over the ...
0
votes
1answer
24 views
One site takes a long time to make a connection, other sites on server fine
On a CentOS server with multiple websites, one particular site takes a long time to respond to requests from some geographical areas, but not from other geographical areas. Other sites on the same ...
1
vote
0answers
22 views
Stunnel + Varnish + Apache questions
I am currently running Varnish in front of apache for all http traffic. I added stunnel so as to take advantage of the cache for https connections as well. So, for https, stunnel talks to varnish ...
0
votes
2answers
70 views
Quickest way to merge snapshots in VirtualBox
I have vdi with quite a number of snapshots taken from it - say, 50 or 70 snapshots.
I want to have one plain vdi with a current state. These snapshots take way too much disk space and are not needed ...
0
votes
1answer
24 views
Does taking EBS snapshots supposed to significantly slow down the performance of the EBS volume?
I'm trying to decide on the frequency of making snapshots. Is the AWS system designed in such a way that taking snapshots has a negligible effect on the performance of the volume, or can it ...
-3
votes
0answers
24 views
Web Server Hardware Requirements for Symfony Website [duplicate]
I have an Website that is going to be highly publicized in the next months.
I am expecting about 10 000 page views per day.
Our Hardware:
dedicated Server;
Intel Xeon E5-2609 ...
0
votes
1answer
29 views
epoll timeout configuration in lighttpd
Is there a configuration option to tune epoll timeout in lighttpd? I'm developing an embedded Linux (2.6) device, with lighttpd 1.4.30. And I'm observing the following issue: even when the system is ...
0
votes
0answers
52 views
How to reduce or shrink the MFT (Master File Table)?
I have a dedicated windows server 2003 with more than 3 millions of files, recently I created a new partition to separate the website files from the OS.
Later I reduced the site of the OS with some ...
5
votes
1answer
250 views
Does APC really improve performance with PHP 5.3+
According to a Linux Adminstrator over at Hostgator:
With PHP 5.3 having APC installed is not needed as PHP 5.3 already has
improvements that APC does resolve in it.
Is that statement actually ...
2
votes
1answer
35 views
Domain unavailable when resuming from sleep
We have a school library with a bank of computers for students, joined to an active directory domain. I'm investigating an issue with these computers where at some time in the last six to nine months ...
1
vote
3answers
88 views
TCPing reports 20ms latency between Web Farm and DB
We have a IIS web farm sitting in a DMZ connecting to a MSSQL DB(Windows Cluster). After troubleshooting some performance problems we stumbled upon strange network behavior.
We wanted to test network ...
0
votes
2answers
88 views
Very poor performance on LUKS/LVM/RAID combination under Debian Squeeze
I have the following issue: I have an encrypted partition on a lvm on a plain partition on the hd. Now I craeted a RAID array to increase the performance. That means, that I have the following stack: ...
0
votes
1answer
43 views
Why is hash join slow in postgresql 9.1?
I transfered my DB from Postgresql 8.4 to new server with Postgresql 9.1. Size of DB is 9.9GB
Data directory is situated on ssd 60GB disk. And server has 16GB RAM and 16 proccessor cores.
But today ...
0
votes
1answer
155 views
How to get more I/O performance from Citrix XenServer?
I have a Citrix XenServer 6.1 installed on a HP Server (1x Intel Xeon E5630 @ 2.53GHz (4 cores, 8 threads, RAM: 752MB for dom0 and 55286MB for the guests). The server has 2 scsi mirrored disks and is ...
-1
votes
1answer
28 views
Improving Database Performance [closed]
I've heard that you can do something like the following in my.cnf to get better performance:
tmpdir = /dev/shm
I'm running MariaDB and wondering is this a good idea? All it does it create the ...
1
vote
1answer
47 views
What happened to hard disk
I suspect that with my hard drives is something wrong.
iostat -d -x -m
root@srv2:~# iostat -d -x -m
Linux 2.6.32-5-amd64 (srv2.host.com) 04/23/13 _x86_64_ (2 CPU)
Device: ...
1
vote
0answers
27 views
How to increase memory and cache size for application pool in IIS 7 efficiently [closed]
I have searched the internet for how to increase memory and cache size for application pools in IIS 7 but all topics are diffused and I don't know the effect of combining those settings together.
Can ...
1
vote
2answers
45 views
How do I improve the performance of my Drupal site with a lot of concurrent users?
I have a Drupal site that may receive a very high hit rate on launch. We've rented a very beefy server for the initial launch, after which we'll downscale. The server has a Xeon E5-2670 8 core ...
1
vote
3answers
67 views
Measuring network latency
I want to measure performance of the network, especially latency. We are performing stress tests of a system that sends live audio / video data over the network. When there are multiple simultaneous ...
0
votes
1answer
40 views
IIS 7.5 Log Request Processing Time
I am running on a performance issue with ASP.Net 2.0 Application.
A page takes atmost 20+ secs to load in a browser.
I would like to know where the problem is occurring, i.e in browser(rendering) or ...
1
vote
4answers
303 views
Slower file create on faster server. Why?
I have thwo servers. The old one is 24GB RAM, i7-950 @ 3,0Ghz, 2x 1,5TB SATA HDD (ST31500341AS). The new is 32GB RAM, i7-3770 @ 3,4GHz, 2x 3,0TB SATA HDD (ST3000DM001-9YN166).
Now I noiticed, ...
0
votes
0answers
22 views
Is There a performance improvement in Windows Azure? [closed]
guys, how are you doing?
This week was annuncied infrastructure-services news, and I had problems with my blog. My first thought was if the CGI services in Azure Web Sites was broken (my blog is ...
2
votes
1answer
92 views
MSSQL 2012 usage of the CPU cores?
I am on decision border which processors I shall go for, and I need an information on "how actually works MSSQL 2012 with the CPU cores ?"
basically my question is follow :
1 query which extracting ...
0
votes
1answer
59 views
Intel Xeon or AMD Opteron is better for MSSQL 2012?
Is there any difference in performance, optimisations in MSSQL 2012 on Opteron and Xeon platform ?
basically we are thinking about 2 x 6 Cores Xeon E5-1660 or 2 x 16 cores Opteron 6380
1
vote
4answers
61 views
Web server response time variability
I have Apache2 Web server and tiny PHP script
<?php
echo '1'
When refreshing page the waiting time value in Google Developers Tools can vary from 24-26 ms to 300-350 or somtimes it is even more ...
0
votes
2answers
55 views
How to measure I/O performance of ramdisk (/dev/ram0)?
Can we measure I/O performance of ramdisk(/dev/ram0) ?
AFAIK I/O performance can be measured using 'dd' command.
Eg:
# dd if=/dev/zero of=/mnt/ramdisk0/file bs=1k count=200
1
vote
1answer
105 views
Read IO Wait Increase
While troubleshooting a performance issue on a Debian Linux box running ext3 on software RAID 1 I redirected the output of a process writing useless temporary log files to /dev/null (ln -s /dev/null/ ...
2
votes
2answers
69 views
Serve large number of small images in ext4
I read through some similar question, but still have some confuse about my situation.
My website allow user upload huge number of large images (scan pages of book). My server will auto tiling and ...
1
vote
2answers
44 views
How to enable gzip for files not on your server?
I'm running a gtmetrix.com report against my site. I get an F(41) for gzip compression. I don't own the two problem files mentioned for this penality.
One file is a CSS on Mailchimp's server. Another ...
0
votes
1answer
37 views
MAXDOP and Interesting Performance Experiences
i would like to receive an advice on the following topic.
With one of our products from our company we "connect" to an existing database on customers side and import orders into our own SQL Server to ...
1
vote
1answer
46 views
Hyper-V and CPU Usage
I'm renting VPS that I believe is using Hyper-V. Lately the processor performance of my VPS has been terrible, yet the CPU usage in the task manager doesn't show it struggling. Is the CPU usage in the ...
0
votes
1answer
23 views
strace vs. log4cxx performance hit?
I need to debug some issue on a production server, and I'm trying to decide whether to use strace or the log4cxx logging library; one crucial characteristic I need to know before, is which of the two ...
