Questions tagged [performance]
Questions about server hardware and software performance, or network performance.
3,202
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Performance problem on a VMWare ESX virtual hard drive
I have performance problems on a virtual hard drive on a VMWare ESX 4.0 virtual machine. See the weird following sequential read speed graph:
I passed the test several times, and the shape is ...
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Are independent persistent disks faster than dependent ones in vmware server 1?
Please can you help me compare disk types for vmware server?
I know "independent nonpersistent" is slower. But what about "independent persistent" versus "dependent" (or how do you call this one?)
...
user89021
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howto measure network bandwidth/perf
we have a corporate LAN of approx 200 nodes behind a firewall and recently upgraded bandwidth of ISP. Now we want to measure the performance / bandwidth (internet as well file copy perf on local ...
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Tracking number of IOs to disk on Windows
I'm trying to compare 2 versions of a backup software product.
I setup all IO to go to a dedicated drive.
Is there a way with performance monitor (or anything else) to track the number of IO ...
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need high performance, distributed storage of audit logs from multiple servers
I have a load balanced farm of servers that need to log various messages to an audit log, which will be processed off line at a later stage (This is a medical app, so all access to patient records ...
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VMware ESXi 2U Server Vs. Traditional Bare Metal 1U Server
I have a Dell PE 2970 quoted and ready to order with the following specs:
2X 6-core AMD 2.2ghz 6mb HT-3
6X 73gb 15K SCSI 6Gbps 2.5in (RAID 10)
16GB (4X4gb) 800mhz RAM
2X Intel Pro 1000PT Single Port ...
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Email server for huge number of subscriber
My question is that my company is thinking of providing a free email account for each of its customers. As a new company we will assume that our corporate email system will be MS Exchange server which ...
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Performance of software raid 5 in XenServer 5.5
Does anyone have hands-on experience to share with regards to software raid performance under XenServer 5.5?
I've recently moved from VMware Server 1.x on Ubuntu to XenServer 5.5 hoping for an ...
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Postfix mail server (outbound) strategy
I am about to setup a web application that consists of 2 app servers (running php/apache) and 2 db servers (ubuntu slices on slicehost).
The application will be sending approximately 5000 emails a ...
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What is the difference between QuadCore and Core2Quad?
In Market there are two types of processors as Core2Quad and QuadCore. What is the architectural/performance difference between two flavours?
I have the same question with older Core2Duo and Dualcore ...
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Server's Disk Queue Length is high, but Disk Bytes/sec is lower than it's capable of
I have an environment running SQL Server on a Windows VMWare platform using a SAN with SSDs set up in RAID 6, and using Veeam for server backups and LiteSpeed for SQL Server backups.
I've had a ...
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Accelerate loading time in others countries by installing some kind of VPN? (What is it called?) [closed]
My servers are hosted in France (OVH) and my users are mainly from France.
I am starting to have more and more users in Asia and North America, but some of them have huge speed problems : more than 3-...
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KVM Virtualization Server - One physical disk(SSD) every virtual machine
In terms of performance,
is it better to have one "big" SSD disk for several (lets say 5) virtualized guests,
or a single smaller SSD disk for every virtual machine?
any general draw back ...
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Single drive performance in RAID1
I see many tools to measure the performance of RAID1.
But how to measure the performance for each SSD in RAID1?
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Will thousands of folders slow IIS or the OS its on
We have an IIS-7 server on Windows 2008. A custom web app writes files that clients upload to an NTFS partition. Each year we have between between 40,000-60,000 folders with 2-20 files in each. ...
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Poor Write I/O Performance on HP ML110 G9 Server With ESXi 6.0U2
hi everyone i need a little bit of help since i cant find a solution,
i have a HP ML110 G9 Server with:
8gb Ram
2 HDD of 2tb Each one and one SSD of 250 GB
i have installed ESXi 6.0u2 HP Customized....
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top: sy higher than 70: What is going on here?
From the man page of top:
sy: time running kernel processes
The sy-value has peaks with values above 50, and then goes down to about 5 again.
What could be the root of it?
Here are two snapshots ...
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Router - huge difference in Tx vs. Rx
I have two computers:
(B) Banana Pi - 1 Gigabit Ethernet, Wi-Fi (supports 802.11n)
(D) Desktop PC - 1 Gigabit Ethernet, Wi-Fi (2x2 MIMO, supports 802.11n)
And (R) Mikrotik RouterBOARD RB951G-2HnD - ...
- 1,882
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Delaying packets with libnetfilter_queue
From my Raspberry Pi configured as an access point, I set the following rules:
sudo iptables -I FORWARD -p tcp --sport 25 -j NFQUEUE --queue-num 0
sudo iptables -I FORWARD -p tcp --sport 80 -j NFQUEUE ...
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Is "'Light-Speed' Disk Access" really a thing? [closed]
I just saw an advert for Hyve hosting on You Tube. One statement made me curious, they said they offer "'Light-Speed' Disk Access":
Is this just a fancy way of saying they have optical technology, ...
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I/O and RAM limitations are important for Hadoop performance. But is disk speed related to I/O?
Hortonworks says this: "Most often performance of a Hadoop cluster will not be constrained by disk speed – I/O and RAM limitations will be more important." *
How is disk speed not related to I/O ...
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RAID1 very slow with LSI card and 2x Samsung EVO 850 drives
not sure if I'm checking it correctly, but here is what I have.
Desktop, LSI 9260-8i card, see config below. 2x 500Gb Samsung 850 EVO drives.
I also have Samsung 830 drive attached to motherboard ...
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Parallel disk seek with JBOD
I'm looking to build a 80 TB file based storage system. Ideally, I'd like to do this with a large JBOD and one server with a lot of cores.
My question is: Will JBOD containers (like Intel's) allow ...
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Logging detailed network activity on Windows Server 2008
One of my clients is experiencing internet delays and outages within their small network. They've verified with their cable company that the issue is not related to any cable company outages. The ...
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Linux unfriendly IIS/ASP.NET :-) : Quick download on windows but slow on linux [closed]
This particular web site (gops.tay.be) serves objects quick if I try to request the page using windows, but I get them very slow if trying using linux. There is no difference if I use browser or curl:
...
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659
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Graceful way to rsync millions of files between two local folders
I want to rsync a folder with millions of files from a local directory to another, on a daily basis. The files themselves change very rarely.
I want to reduce the impact on the running server, e.g. ...
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Linux server became extremely slow
I have a file sharing website, and my files hosted in a server with those system specifications:
32GB RAM
12x3TB
2x Intel Quad Core E5620
I have files in this server up to 4gb for each file. 446gb ...
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What's a good way to run a point-to-point network speed test over a WAN? [duplicate]
I want to monitor my WAN speed between two offices, and be able to schedule it to run at certain times of the day.
I guess in its simplest form this is just a point to point copy, but I want to ...
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I/O on SSD hosting a DB periodically hangs with queue length peaks of 800+
i have a problem which i cannot identify correctly. I have a process (on WinSrv 2008 R2) which imports data into Mongo DB and periodically whole system freezes - once per 5-10-15 minutes for about 20-...
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Is there any MSFT documentation that says RpcClientAccessServer should not be Internet-accessible?
This answer says that the RpcClientAccessServer can cause Outlook to "act slow" if it can be resolved from the Internet (assuming Outlook Anywhere is being used).
Is there any documentation that ...
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Load/stress testing methodology. What to expect and how to interpret results?
We have this new client for whom we're reviewing our server infrastructure.
I know pretty well the web API because I've helped building it and now I'm on my own maintaining and pushing it forward, so ...
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Is it advisable to put eAccelerator cache dir to RAM?
I've just installed eaccelerator on server that's gonna be running Magento. I have a hard disk, so was wondering would my server performance improve if I was to mount eaccelerator cache dir to RAM. ...
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MySQL insert cause high disk i/o wait?
Im getting what appears a lot of wait time when performing large inserts in Mysql. Am I correct in assuming I have a disk I/O problem? Yes I am running Mysql on a VM.
Innodb_buffer_pool hit rate is %...
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One VM slowing all others on ESXi
I've been using ESXi server for a while now.
It's a pretty strong machine (i7-2600 + 16GB RAM), and I use it to run concurrently 5 VMs (Mostly Windows Server 2008 R2).
Most of the times, the VMs run ...
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light web server to run on vps
Has anyone tried to build a really light server that uses the least amount of space and memory, while giving high performance?
I would assume that linux kernel can be configured to keep only ...
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High CPU usage on Linux machine
I have a piece of java code running on two different machines, but on one of the linux machines, the code uses a lot of CPU (close to 100% cpu usage). On the other machine the same code uses less cpu (...
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How often should I clear the OpenX cache directory?
OpenX creates many small php files in /openx/var/cache. After some time, the amount of files is so big that it has an impact on server performance (the amount of files was so big that listing the ...
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Distribute the load all around the world
Let's say we're starting a project which is meant to be served all around the world
How am I supposed to distribute the database and server load, and increase (optimize) the service for large ...
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Website has become slower on a VPS, was much fast on a shared host. What's wrong?
My shared host suspended my website stating system overload, so I moved my website to a VPS which has 4GB RAM. But for some reason the website has become very slow.
This is the vmstat output -
procs ...
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A colleague claims BizTalk is slow and should not be used [closed]
A colleague claims BizTalk is slow and should not be used. He argues that he has never heard anything positive about BizTalk, that it is slow and that customers using it wants to replace it with ...
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Linux - Test the write speed of an NTFS HDD USB drive
I have a Debian box with an USB HDD drive formated in NTFS connected to it. I would like to test the write speed of it because with samba, when I upload files to it from my Windows 7 laptop, I got ...
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How is the average seek of disk estimated given a function to move head to n track
How is the average seek time of disk calculated if a function f(x) is given as an estimate of time to move head of disk to n tracks?
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How to remove swap partitions from RAID 1 Array on Ubuntu?
Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
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RMagick on EC2/Nginx/Passenger performance is horrible
I have a small RoR app that generates images using RMagick and the performance is not anywhere near where I thought it would be. The server configuration is a 64-bit Ubuntu 11.04 image on EC2 running ...
- 153
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Figuring out memory hogging process in a Linux centos machine
I have a micro instance of Centos AMI from EC2 to run my dev instances. Applications keep on blowing off due to memory issues.
How can I find out process that are taking memory and take decisions ...
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Hybrid disks in a server
Has anyone here tried using the Momentus XT Hybrid disks in a real server as balance between performance and cost? What were the results?
I've heard desktop-focused reviews on both sides: a few ...
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Network issues - Windows Server 2003
I am having network issues on my Windows Server 2003.
I am running this test:
I am pinging my server from remote location constantly (ping -t)
I am pinging a stable web site from my server ...
Blokky
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is there any point running APC **and** memcached concurrently
Do APC and Memcached cache the same data? I understand that APC caches both files and objects/variables whereas memcached is object-only, but does memcached offer anything that APC doesn't?
I've ...
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ext3 optimization for 3D design /modelign (Maya 2011) in Centos 5.4 x64
Today i have been partitioning a 1TB hard disk where i want to install tomorrow Centos 5.4 x64 for use for 3D modelling,with Maya 2011.
I created a 10 GB swap ( 8GB ran + 2) a 620 gb partition for ...
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How much memory should I have to run Windows 2008 Server and SQL Server 2008 Web?
I need to improve performance because currently my website is too slow.
I'm currently running SQL Server 2008 Express on a dual-core server with 2 GB of memory.
My app seems to be CPU-bound ...
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