Debian Machine is drastically slow

lakshmi4linux · 04-28-2009, 06:21 AM

Hi,

I'm using Amazon Ec2 machine debian etch flavour.

The machine what i'm using is very slow,if i type some characters it take lot of time to appear on the screen.

The space used is only 29% under / that is out of 10 Gb only 2.6Gb alone get utilised.

Please suggest wat may be the reason for that.

Thanks in advance

repo · 04-28-2009, 06:26 AM

take a look at the output of top to see what is running, and to see how much memory is used.

lakshmi4linux · 04-28-2009, 06:30 AM

Hi,

Thanks for your quick response sir,

output of top command is here

Cpu(s): 21.3%us, 22.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 56.7%st
Mem: 1747764k total, 1712224k used, 35540k free, 168644k buffers
Swap: 917496k total, 644k used, 916852k free, 524612k cached

Please tell wat may be the reason for such drastic slow behaviour of the machine

Thanks in Advance!

i o n · 04-28-2009, 06:36 AM

Please delete this message

farslayer · 04-28-2009, 07:41 AM

So when you ran top. and sorted by processor utilization (SHIFT + P).. what processes were using so much CPU time ?

lakshmi4linux · 04-28-2009, 08:30 AM

Hi,

I ran my top command and give (shift+p). It shows java(jboss) process consumes 40.3% of CPU usage. Rest of the things are just 0.3,0.2,0.0 percentage of CPU utilisation(mysql,apache). Jboss is alone consuming a lot. Is 40% utilisation of CPU make the things worse.

Thanks in Advance!

repo · 04-28-2009, 10:31 AM

Java and linux don't mix well :-)
What happens if you disable jboss ?

farslayer · 04-28-2009, 01:04 PM

/etc/init.d/jboss stop

So are you developing some Java web application on your Machine that you have jboss installed ?

lakshmi4linux · 04-29-2009, 12:46 AM

Hi,

Thanks a lot.

Forget to say i'm using debian machine for devloping java application and jboss is running.

While i shutdown the jboss the CPU utilisation get reduced, But after that also the machine behaves in a simillar fashion only(takes huge amount of time to display even if i type ls)

Thanks in Advance!

bhaslinux · 04-29-2009, 03:22 AM

is this a console access or a network access of the debian machine ?

1. if network access, can you do a tcpdump (ignoring the current logged host - i.e tcpdump host not <ip address of the gateway> )
and check if there is huge traffic. This can also slow down the link and hence the machine may be less responsive.

farslayer · 04-29-2009, 07:44 AM

With jboss shutdown, is there still something eating CPU time ?

Quote:

Small Instance
(Default) 1.7 GB of memory,
1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit),
160 GB of instance storage,
32-bit platform

I wonder what 1 EC2 Computing unit is equivalent to..

I just don't know. maybe that is good performance for their cloud system.. ???

There is a forum over at amazon for the EC2 stuff. maybe someone more familiar with the cloud would have some insight ?