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). ...
1
vote
2answers
573 views
IIS/ASP Request Wait Time Need Advice
We are running an ASP application using ASP 2.0.50727 running on IIS 6.0 and Windows 2003. We are having random high response times and I can see using PerfMon at times we have ASP\Request Wait Times ...
-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
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 ...
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 ...
1
vote
1answer
736 views
BackupExec 12 + RALUS - VERY slow backups
We use Backup Exec 12 and the Remote Agent for Linux/Unix Servers (RALUS) to backup a large
RHEL5 system. For various reasons we need to do a daily working set job. These working-set jobs run ...
2
votes
2answers
553 views
What performance loss is to be expected through VPN?
At work we have a Windows 2008 Server-based network with over 60 computers. We are planning to set up a Windows 2008 VPN server shortly to provide remote access, and I am wondering what kind of ...
-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
vote
2answers
1k views
nginx+php-fpm help optimize configs
I have 3 servers.
First server (CPU - model name: 06/17, 2.66GHz, 4 cores, 8GB RAM) have nginx as load balancer with next config
upstream lb_mydomain {
server mydomain.ru:81 weight=2;
...
-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) ...
33
votes
23answers
43k views
How to copy a large number of files quickly between two servers
I need to transfer a huge amount of mp3s between two serves (Ubuntu).
By huge I mean about a million files which are on average 300K.
I tried with scp but it would have taken about a week. (about 500 ...
3
votes
2answers
199 views
Network issue with ESXi 4.1 during large file transfers (VM migration)
VM migration from one ESXi host to another is causing a strange graph signature that is very reproducible:
I have no idea why this is happening. The ESXi server is a Dell PowerEdge 2850 using an ...
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 ...
4
votes
3answers
2k views
How can I find out what is causing interrupts on Windows?
Occasionally I come across servers (Windows 2003 and 2008) with high processor % interrupt time. Is there a way to see what program or device is causing the interrupts?
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 ...
5
votes
1answer
3k views
HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
I have running system with low IO utilization:
HP DL380G7 ( 24gb RAM )
Smart Array p410i with 512mb battary backed write cache
6x SAS 10k rpm 146gb drives in RAID10
Debian Squeze linux, ext4 + LVM, ...
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 ...
3
votes
4answers
1k views
Performance of ClearCase servers on VMs?
Where I work, we are in need of upgrading our ClearCase servers and it's been proposed that we move them into a new (yet-to-be-deployed) VMmare system.
In the past I've not noticed a significant ...
0
votes
3answers
84 views
Passively monitor IO wait spike on process level
We use munin and monit to keep track of general stats about our vps, in last a couple of weeks, we have been running into issues where random IO wait spike is killing our server performance.
Since ...
0
votes
2answers
50 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
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 ...
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 ...
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 ...
2
votes
4answers
1k views
Performance gains of putting Windows pagefile on separate partition (same disk)?
I am making a drive image that will be deployed to several computers, and I'm tweaking it for performance. It is a Windows XP image.
Considering there is only one hard drive, will the machine gain ...
3
votes
5answers
1k views
Improving Exim performance: mounting message queue on RAMdisk
I have an email server that's part of a messaging application, and it's going to see a lot of throughput. I want to mount Exim's message queue on a RAMdisk to maximize performance; throughput speed ...
3
votes
1answer
1k views
Apache on Win32: Slow Transfers of single, static files in HTTP, fast in HTTPS
I have a weird problem with Apache 2.2.15 on Windows 2000 Server SP4. Basically, I am trying to serve larger static files, images, videos etc. The download seems to be capped at around 550kB/s even ...
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 ...
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
1answer
704 views
IIS 7.5 extremely slow, intermittently no response
I have a problem with our web server. It's running about 35 ASP.NET (mostly 4.0) sites using Windows Server 2008 R2 with IIS 7.5. It's patched as of mid-January this year.
Symptoms:
Intermittently ...
0
votes
1answer
672 views
Performance issue on solaris 10 zone. Multiple pollsyscalls
We have slow running JAVA program on a Solaris 10 Zone. I ran a truss on the pid and noticed following messages getting generated even when program is not doing anything:
pollsys(0x00000000, 0, ...
0
votes
1answer
611 views
How efficient is iptables' hashlimit module?
I'm looking for a solution to rate-limit on an ip basis. How many packets can the hashlimit iptables module handle on a recent Intel x86_64 CPU core? 1.000/sec? 1.000.000/sec?
3
votes
2answers
1k views
High disk I/O - jbd2/sda2-8 process
I have run a file server on a CentOS 5.8 final server.
My only concern at the moment is what appears to be intermittent but continuous high disk I/O activity causing a general slowdown because of ...
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, ...
2
votes
1answer
241 views
Windows Performance Monitor keeps trying to add unwanted counters
I have been running a Data Collector Set for SQL Server for a week, and everything was going just fine until I tried clicking on Action -> Save Current View and now it always tries to add the ...
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 ...
6
votes
8answers
4k views
Should I completely turn off swap for linux webserver?
Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load.
...
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 ...
-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 ...
2
votes
1answer
988 views
Why do I see a large performance hit with DRBD?
I see a much larger performance hit with DRBD than their user manual says I should get. I'm using DRBD 8.3.7 (Fedora 13 RPMs).
I've setup a DRBD test and measured throughput of disk and network ...
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 ...
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 ...
