1. UNIX for Advanced & Expert Users

Hello, I have a mail server (sendmail) with SUNOS 5.5.1. Just recently it began to respond very slowly. I used vmstat to check the performance data. Only interupt, system call and CPU context swiching are relatively high. Other statistics are normal, especially CPU utilization are very... (5 Replies)

2. UNIX for Advanced & Expert Users

Hello, I have a performance problem on an AIX box. I'm not sure what is causing this and hoping someone may have suggestions. Currently I'm noticing that cpu's are waiting while the box is in a idle state. I checked the disks and none of them are at 100%. If they were then I would understand... (3 Replies)

3. UNIX for Dummies Questions & Answers

I have a Teradata Machine, using MP-RAS Unix, with a 1000 Intel Ethernet card and a Cisco switch. If I configure the ethernet card and the switch to auto, so they negotiate to 1000, or configure the ethernet card and switch manually to 1000Full or 100Full, the velocity is very very low. Only... (2 Replies)

4. Emergency UNIX and Linux Support

This is a weird problem I've been butting my head against for days now... I have two OpenVPN servers set up with identical configurations except for the keys. One of them is hosted in a datacenter with a large backbone, the other is hosted on my home server's limited residential internet. One... (9 Replies)

5. Linux

hello, i'm having some performance problem on one of my linux machines and i hope someone will be able to help me analyzing the problem. machine info: Linux fedora, cpu x 4 cores of 1.6Ghz, 8G memory, 8G swap. i've enabled sar on my machine and created a graph using ksar utility for... (15 Replies)

6. Red Hat

Running CentOS 5.5: I've come across a relatively recent problem, where in the last 2 months or so, the root disk goes to 99% utilization for about 20 seconds when a user logs in. This occurs whether a user logs in locally or via ssh. I have tried using lsof to track down the process that is... (5 Replies)

7. HP-UX

My server is running HP-UX 11.23 and one Oracle database. The server has 8 CPUs and is mostly idle all the time. Buffer cache is set to 10%min/max with 5GB memory on the server. I have a user complaining that a batch process is all of a sudden taking a long time to finish. The DBA gave me the... (13 Replies)

8. UNIX for Advanced & Expert Users

Working on a simple, half duplex network diagnostic that will run anywhere using nc and dd. Performance is symmetrical with sink and source nc processes open as a server: nc -vkl 5000 > /dev/null & cat /dev/zero | nc -vkl 5001 & With this on the client: nc host0 5001 | dd of=/dev/null... (0 Replies)

9. Shell Programming and Scripting

Hi, I am Shell script beginner. I wrote a shell programming that will take each line of a file1 and search for it in another file2 and give me the output of the lines that do not exist in the file2. I wrote it using do while nested loop but the problem here is its running for ever . Is there... (12 Replies)