The performance tag has no wiki summary.
1
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1answer
44 views
Apache2 mod_wsgi python 2.6 Django very slow
I've tried about 1000x things, but I can't seem to figure out why a simple django website is slow using apache 2.2.14/wsgi latest / django 1.3. I've confirmed the problem isn't our database by turning ...
0
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0answers
7 views
How to quantify TEMPDB usage in relation to other databases hosted on same hardware? [migrated]
Working on a project to decide if configuration 1 or 2 is the best way to organise disks for my SAN:
Config1 (sql 2008)
8 disks @ raid 10 data
2 disks @ raid 1 logs
2 disks @ raid 1 tempdb
2 disks @ ...
1
vote
2answers
41 views
Server performance problems every 12 hours after reboot
I am using a Windows VPS with Windows Web Server 2008 R2. The server is running IIS and MSSQL Server 2008 R2.
Every 12 hours I have performance issues on this server. This occurs every 12 hours after ...
0
votes
1answer
81 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;
...
0
votes
2answers
67 views
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 ...
3
votes
1answer
145 views
My server doesn't seem to be caching anything well
I have a VPS from tocici (via BuildYourVPS). It's got 4 GB of RAM (2 GB of it "burst" RAM).
This server has some severe performance issues, however. First, a quick explanation of what this server ...
0
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0answers
23 views
Any known performance issue and workout for Jboss
Currently I'm using Jboss behind Apache HTTP Server. I wanted to know if there are any security/performance concerns that I may need to face if I remove Apache HTTPd.
I also wanted to remove the ...
0
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3answers
88 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 ...
0
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2answers
86 views
Adding Drupal to my server means it now has performance problems
I have a vb 3.8.4 forum and a drupal pressflow 6.22 site on together on my hosting server
When i added the drupal site to the server
I had a lot of performance problems in the server
And sometimes ...
0
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0answers
20 views
nat over pptp downloading too slow
I have a server A running pptpd on CentOS 6.2. And I also setup ip_forward and nat on server A so that clients can access internet via their vpn gateway server A.
When a client B(win7 x86_64) connects ...
0
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0answers
12 views
jquery ? Javascript Performance issues for looped timeouts? [closed]
We have we have map with jquery animations on site home page and using jquery timeout for showing rotating alt tips on map. Does it make any impact on performance? Map on Homepage of ...
1
vote
1answer
38 views
Server Processor Selection Criteria & Profiling
We are purchasing a server to run various Bioinformatics software packages. The main package on our test machine is multi threaded and is totally CPU bound, the IO & RAM are not limiting ...
1
vote
1answer
37 views
ApacheTop like tool for Nginx for measuring hit contents?
Are there ApacheTop like tool for Nginx for measuring hit contents?
I want to find out the most popular URL from the web server log (Nginx)
2
votes
2answers
60 views
Website load speed around the world
I would like to test a small website's loading speed around the world.
What are some relevant websites/tools that you find useful for this test?
0
votes
3answers
81 views
Best my.cnf configuration for a 8GB MySQL server with MyISAM use only
I am preparing a large Drupal 6.x based installation and have setup a dedicated MySQL server with 8GB of RAM. Drupal 6.x uses only MyISAM engine and there will be around 500 concurrent users using the ...
4
votes
4answers
266 views
Linux: how many disk I/O does it take to read a file? How to minimize it?
According to this paper on Facebook's Haystack:
"Because of how the NAS appliances manage directory metadata, placing
thousands of files in a directory was extremely inefficient as the
...
1
vote
3answers
97 views
Can cloning a hard disk drive to a SSD drive physically damage the SSD or the performance of the SSD?
I have a new SSD drive, I want to use it to replace the old mechanical hard disk drive in a laptop.
The laptop had a new O/S (Windows 7 64-bit) installed about 9 months ago and I want to know if it's ...
1
vote
3answers
58 views
Use different dns servers for CDNs
Back when google first released their 8.8.8.8 and 8.8.4.4 dns servers I did some profiling, and they are way faster for our location. A more recent test confirms this is still the case. However, after ...
0
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2answers
38 views
SYN cookies on internal machines
Our system uses Cassandra running on Ubuntu 10.04 and during last spike in traffic we observed the following message in logs:
possible SYN flooding on port 9160. Sending cookies.
These machines are ...
2
votes
2answers
86 views
Should I copletely turn off swap for linux webserver?
Recently my friend told me that it is a good idea to turn of swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load.
...
0
votes
2answers
35 views
Request Executing leak in IIS 6.0 till Server Busy
I've got an application running on IIS 6 that's being hit by hundreds of remote clients doing all kinds of requests, some that are long running and some that are not.
On some deployments, one in ...
0
votes
2answers
67 views
How can I configure Apache to use more of my CPU?
Apache threads are stacking up on one of my web servers (300-500 simultaneous requests, some taking 3-8s to process!), but CPU usage is very low (~10%). Page load time is slowing way down as a ...
3
votes
3answers
93 views
Limit Hard Drive Write Speed by User in Linux
Background:
I use a cluster with my coworkers and if anyone writes too many big files at the same time I can't even move the cursor in vim (the horror!). I'm not sure if it is more related to the ...
1
vote
4answers
136 views
Hardware requirements to monitor a larger (3000 device) network
I'm currently evaluating monitoring software for (by my standards) a larger network expected to grow to around 3000 devices. I'm finding data on the hardware requirements for scaling hard to come by. ...
1
vote
2answers
180 views
Why does “cat /dev/null” and “ls” take 5 seconds to load?
One of my web servers is responding very slowly. Even to simple unix commands. Can you help point me in the right direction to debug?
Here's a crazy example:
# cat /dev/null
This command ...
0
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0answers
42 views
PerfMon Counter Performance Impact
Does running a constant data collector set on a server effect the actual server performance? Or does PerfMon not really affect the server and resources?
3
votes
2answers
135 views
Exhausting Linux machine TCP socket limit (~70k)?
I am the founder of torservers.net, a non-profit that runs Tor exit nodes. We have a number of machines on Gbit connectivity and multiple IPs, and we seem to be hitting a limit of open TCP sockets ...
1
vote
1answer
37 views
Does it make sense to copy files in parallel to the same NFS mount?
Here's an example:
( cp /tmp/one /nfs/one ) &
( cp /tmp/two /nfs/two ) &
( cp /tmp/three /nfs/three ) &
( cp /tmp/four /nfs/four ) &
( cp /tmp/five /nfs/five ) &
wait
Against a ...
1
vote
0answers
39 views
High Lock Wait ratio in MySQL
on my site I log every pageview (date,ip,referrer,page,etc) in a simple mysql table.
This table gets very little selects (3 per minute), but a lot of inserts. (about 100 per second)
Today I changed ...
3
votes
1answer
96 views
What's the advantage of splitting a mysql table into smaller ones without physical distribution?
I've seen such design in my company.
A big mysql table is split into tens of smaller ones of identical schema on the same server in the same db, without any physical distribution, no ...
-2
votes
0answers
38 views
ReadyBoost or RSTv10.5 to boost my HDD read time using an SSD? [closed]
I am trying to figure out which of the two following scenarios would perform faster. The system has a 500Gb disk, 8Gb Ddr3 Ram and i7 2600, Win7 x64:
Scenario - ReadyBoost
SSD drive in sata3 with ...
2
votes
1answer
71 views
Very low requests/second with fresh NGINX install
With a fresh install of nginx, I obtain these results running apache benchmark, which I feel are very very odd. The page fetched is the default static index.html test page installed by nginx. Running ...
0
votes
3answers
115 views
log forwarding performance and OS bottleneck
How many logs/second can usually be handled by syslog servers? By syslog servers, I am referring to rsyslog, syslog-ng, splunk etc. The intent of the question is to find out at what logs/second rate ...
-1
votes
2answers
63 views
New server: use for SQL Server or Windows (Web)? [closed]
I picked up a new Dell R410 2.8 Ghz 12M cache 32 GB Ram RAID-1/RAID-1 for a good year-end deal. It was purchased mainly to replace my Dell PowerEdge 2850 which is my main WEB server. I run Windows ...
0
votes
1answer
31 views
loading testing from a one ec2 linux/ubuntu instance to another ec2 linux/ubuntu instance
I wanna run a load/stress testing on ubuntu ec2 small instance. I could have done it using Jmeter from my laptop itself, but that would actually consume lot of bandwidth and also I feel I cant get the ...
0
votes
2answers
33 views
How to make pg_dump less resource greedy
I have configured cron to invoke pg_dump on a daily basis using following rule:
# xyz database backups:
00 01 * * * root umask 077 && pg_dump --user=xyz_system xyz | gzip > ...
0
votes
1answer
48 views
Large amount of traffic incoming. Preparation tips
Looking for any tips on improving performance on the server level as my client will be getting some heavy traffic in the next few days.
Using a 1and1 cloud vps and increased the memory pretty high on ...
0
votes
1answer
56 views
Is uploading a 500mb file to s3 an expensive operation? Any way to limit cpu usage etc?
On a production server, I'm planning on uploading a single file or a set of files that may be 500 megs in size.
I havent' test it just yet, but just want some opinions on whether you think this will ...
1
vote
1answer
43 views
IIS6 vs IIS7 performance comparison
Are there any graphs or analytics about the performance comparison of switching from IIS6 to IIS7? I would like to convince my client to switch to Server 2008 IIS7.
2
votes
1answer
47 views
RAID 10 or RAID 1 x 2 for Hyper-V with AD, EXCHANGE on Windows 2008 R2
We have 2 servers which have 6 SATA 7200 disks inside (each). We want to configure both servers so that they will have Window Server 2008 R2 Enterprise installed and on top of it Exchange 2010 x2 (for ...
0
votes
3answers
116 views
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 ...
9
votes
2answers
254 views
Expected performance of e-SATA port multiplication?
For a certain read/write workload, I get 30 MiB/s from a 4-disk array using esata port multiplication. When I move the exact same array to four individual sata connections, I get 90 MiB/s for the same ...
-2
votes
4answers
85 views
what are all the common factors affecting VM performance? [closed]
Recently we faced a performance problem in our ESXi 4.1 hosted in Dell R710 server.
I verified RAM and it was 48 GB. I checked the CPU it was quadcore. Finally i came to know that the server had only ...
1
vote
0answers
70 views
LXC deteriorates CPU performance over time
I have a machine with 2 LXC containers.
As time passes, the %sys used by CPUs increases regularly. After about 4 weeks, it reaches 40-60% all the time (on each of the 8 CPUs) and makes the machine ...
0
votes
2answers
118 views
What is the internal latency of a Cisco 3560?
Our trading network is very latency sensitive. We use Arista switches for the latency sensitive parts, and we know that the latency there is 600 ns.
However, we have a Cisco 3560 in part of the ...
0
votes
1answer
103 views
Strip down ubuntu server for performance on virtual machine
We use a ubuntu virtual machine for a local development setup which provides a consistent development environment for all developers and lets them use an OS/IDE of their choice for other work.
The ...
3
votes
3answers
92 views
Linux tape drive throughput performance statistics
Does anyone know a way, (other than using SystemTap + iostat-scsi.stp script), to get Tape Drive performance statistics?
Server:
Red Hat Enterprise Linux Server release 5.7 (Tikanga)
Kernel ...
1
vote
0answers
60 views
trying to debug slow remote mysql server issues
Here is my scenario I'm trying to debug:
I'm profiling MySQL queries using PHP's microtime() function, to determine how long each query takes. I have tested it on one domain, and comparing average ...
1
vote
1answer
175 views
Oracle 11. Updating BLOB field. Db file sequential read inappropriately slow?
I've and Oracle (11 Enterprise) schema with a table
CREATE TABLE USER.WSP_BUNDLE (
NODE_ID RAW(16) NOT NULL,
BUNDLE_DATA BLOB NOT NULL
);
CREATE UNIQUE INDEX USER.WSP_BUNDLE_IDX ...
0
votes
1answer
53 views
What is the difference betwwen two Xeon CPUs with stepping 11 and 7?
Would you please explain me what kind of differences between these two CPUs have:
1)
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : ...
