IO (or I/O) is an abbreviation for input/output, most commonly referring to disk input/output.
IO (or I/O) is an abbreviation for input/output, most commonly referring to disk input/output.
Questions tagged [io]
401 questions
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Beyond 1Gb upload on a single linux server
I have a high hit nginx web server on CentOS that provides static large content. when the number concurrent connection are low, server could easily provide up to 4Gb of traffic , but when the number of concurrent connections increase, the server…
anthonio mackay
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can Iowait cause significant RAM consumption increase
I have a node.js process running continuously on a linux EC2 instance, it extracts data and stores it in mysql. Some reads are also performed on the database.
The process can run well during hours or days, and have a steady RAM consumption. But from…
Mehdi
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What dose these units means in zabbix?
When i try to set some items for my disk read and write, I found it by vfs.dev.read and vfs.dev.writefor zabbix-agent. This item contain a parameter named type which some of them are unknown for me.
What's the meaning of the below…
shgnInc
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IOMeter showing hardly any data
I ran IOmeter on a Windows Server 2008 R2 SP1 server for 18 hours and when I clicked on "Stop current Test and Save Results" it stopped the worker processes (I only had 1).
When looking at the results in the csv file it hardly shows anything...it…
lara400
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High Disk I/O on server reboot
A CentOS 5.8 machine has high Disk I/O upon starting up. The processes taking up disk IO are kmirrord, kjournald and pdflush. I have done the performed the following:
1) Mounted the filesystem with noatime parameter.
2) Linux kernel version < 2.6.20…
Ankit
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Munin graph Disk IOs for /dev/sda k unit interpretation
From Munin diskstats plugin Disk IOs for /dev/sda graph shows Max IO/sec -read/+write 1.75k/920.92.
What does the k unit in Disk IOs graph mean?
user1431003
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How to disable search body in dovecot?
We run mail server of 30k e-mail accounts (Maildir) with Dovecot imap server. We suffer from high IO load, especially when a user starts to search large IMAP folders. Is any way of preventing search by BODY? I need to allow search by HEADERS…
user3017278
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low priority linux filesystem
Does anybody know of a some sort of (virtual) filesystem that will run as a low priority i.e. All other regular disk activity will take priority?
The reason for this is an application I am developing has a large amount of background disk IO to…
mnik
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IO impact with symlinks
I have an NFS mount for web servers, I've moved log files to local storage to minimize IO load on NFS server but I've created symlinks for these logs (NFS share -> local storage).
Is this still has the same impact on IO load as if they were stored…
HTF
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File I/O Throughput
I have an IBM x3650 M4 server (64-bit) running Ubuntu 13.04 Desktop (32-bit). I realize that this is a non-standard setup by it's being driven by other requirements. I am seeing slow file writes accross the board (to HDD, to USB, to network mount).…
Konstantin Klitenik
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CentOS 5 extremely slow when is running a download
When my server is downloading a file or executing other IO operations the other server functions become extremely slow (almost locked). Even other functions that do not use the network. When a download is in progress, if I start typing in…
Tomir Schmite Jr.
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How to reduce I/O on EC2 micro instance running wordpress
I have been running a very small wordpress site on Amazon EC2 for about 2 months, using the free tier micro instance.
I have been getting billed a few dollars each month for going over the disk I/O allowance.
I have looked into how I can reduce the…
z c
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Why is my synchronized I/O so bad compared to direct?
I have two 3TB disks in a software RAID 1 setup and the host OS is 64bit Debian wheezy.
Issuing:
dd if=/dev/zero of=test bs=64k count=3k oflag=direct && rm test
Yields:
201326592 bytes (201 MB) copied, 1.423 s, 141 MB/s
If I alter the dd command…
corford
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Chrooted from LiveCD: Bad IO performace
my Ubuntu Server installation is broken, so I grabbed a Ubuntu Desktop CD, mounted my Ubuntu installtion on my hard disk and chrooted into it.
But now my IO performance is really bad:
# time dd if=/dev/zero of=/tmp/foo count=1
1+0 records in
1+0…
Marta
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high disk usage = io-bound on an apache + postgresql web server?
I have a server running apache, postgresql, and a lot of sites, and my graphs from my hosting provider indicate basically constant disk thrashing. 10k/s disk usage. This seems like a bad idea, but I'm not really sure why -- load is fine, server…
freyley
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