Questions about monitoring server hardware and software performance, or network performance.

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4answers
2k views

High CXPACKET wait type in SQL Server even with MAXDOP = 1

I have always had a very high CXPACKET wait type, and I've been told that it stems from parallel processing, and I should keep MAXIMUM DEGREE OF PARALLELISM = (Nº Processors / 4), or 1 in my case. ...
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2answers
183 views

SQL performance, how to exactly measure bottlenecks

Yesterday me (programmer) and one of my coworkers from our Hosting department started series of tests to address performance issues with our websites. We are running a server with Windows Server 2008 ...
1
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0answers
573 views

Physical Disk counters not showing up in PerfMon results

I am trying to diagnose some issues for a customer, but i notice that none of the disk related counters show up in my PerfMon results (graph or csv format). I found this article ...
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3answers
212 views

How can I get knowledge about RAM usage by my webapplication?

I have a .Net web application. On one server there are several instances of this application in different versions. How should I know what amount or RAM maximally can consume one instance? How can I ...
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1answer
288 views

Any open source passive monitoring tool like ClientVantage [closed]

I'd like to find an open source tool that do passive performance monitoring. It should: capture network packages between client and server or between servers where the packages comes from a ...
0
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1answer
67 views

Monitoring a service

I have a PHP script that will use exec to run commands on the server. The idea is that it'll monitor a PDF generation script on our server. I'm running into an issue where when the PDF generation ...
2
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4answers
2k views

Best way to say “sync all system clocks to this server, when and ONLY when I say so?” Mixed setup of Windows+Linux servers

Title pretty much explains it. Let's say there's 100 servers, various versions of Windows and Linux, and one Windows server is the "master clock." I did look at this question: How do I synchronize ...
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2answers
94 views

I need an admin toolset for Windows 2003 and 2008

i know this is way too general question but anyway. I need few tools, will write down my tasks as sysadmin and if you have any to automate my job i would be glad to hear. I don't mind paying for ...
4
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4answers
2k views

Monitoring tools that can take high rate and high volume? [closed]

We're using Cacti with RRDTool to monitor and graph about 100,000 counters spread across about 1,000 Linux-based nodes. However, our current setup generally only gives us 5-minute graphs (with some ...
3
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2answers
358 views

Monitoring bespoke software with Zenoss

We've got a lot of back-end applications that we need to monitor the performance of (metrics such as orders waiting to be processed, time since last run, etc). Currently, this is done by an in-house ...
0
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1answer
270 views

JBoss 4.2 Autodiscovery Failure (NoClassDefFoundError)

I am experimenting with Hyperic for the first time. I have a basic server & agent setup and working on a Redhat Linux box. But when the autodiscoverer is running for JBoss 4.2 I get the exceptions ...
26
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6answers
1k views

Top-like tool for IP traffic [closed]

I need to keep watch on how much bandwidth some connections are taking in a server, and I know I have seen a top-like tool for that before. However, I can't remember the name of the tool, and I'm not ...
1
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1answer
572 views

Linux network connections logging

I have linux (OpenSuse) testing server and I would like to have detail log about http and ftp connections (and maybie other TCP connections). Informations I'm interested in are IP address, transfer ...
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0answers
49 views

Hyper-V Performance Monitors Not Working as Data Collectors

I'm trying to monitor vCPU performance in Hyper-V using data collectors and while I can view the real time monitors (Hyper-V Hypervisor Virtual Processor\% Guest Run Time), whenever I try to add the ...
12
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2answers
19k views

What is “a lot” of Page Faults?

I am monitoring the memory object in Windows 2k8, and am tracking the Page Faults/sec counter. Is there any threshold to determining what is an excessive amount of page faults? Or should I be more ...
4
votes
1answer
240 views

“Enterprise Monitoring Solution” with the lightest agent?

I have a network of disparate remote VPS / "cloud" / colocated servers that I would like to monitor from a central location, using open source software like ...
0
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2answers
280 views

How Can Linux Top Show 2% Idle, but Load Say 1.20?

On CentOS5, I'm seeing the 'top' command showing a hover between 20% and 2% idle, but then the load says 1.20. How can that be possible? When I type 'uptime', as well, I see 3 load numbers that are ...
11
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2answers
1k views

How do you monitor the performance of a character device (e.g. tape drive)?

There are many ways to monitor block device performance: dstat and iostat, heck, even sar will give you data on block device I/O rates. Unfortunately, I don't know of any good spur-of-the-moment ...
1
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2answers
782 views

Establish a performance baseline for terminal server windows machines

I need to establish a performace basline for our Terminal Server machines. i plan to use perfmon , and will have a SCOM server on the site very soon. The terminals are used as a desktop environment ...
0
votes
1answer
821 views

Incinga vs Cacti vs Zabbix vs [duplicate]

Possible Duplicate: What tool do you use to monitor your servers? I'd like to get a good overview of the various monitoring tools. I'm looking for something modern, fresh and lightweight ...
0
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1answer
146 views

MYSQL delete optimization

I have the following delete SQL statement: delete w,r from table1 w, table2 r where (w.status=1 or r.status=1) show engine innodb status shows the following. is the read rate(237.29 reads/s) ...
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3answers
91 views

Windows 2008 R2 Hyper V Performance

We would like to monitor/view our performance on all Virtual machines running on our Windows 2008 R2 Hyper V Server. We need the ability to view common stats live on the server and also be able to ...
0
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1answer
348 views

Why is the average in perfmon different than the average calculated from the csv?

I'm looking at a Physical Disk\Avg. Disk sec/Transfer counter in perfmon. We've always had faith in the Average number that perfmon reports over the selected time span. I can't figure out why if I ...
2
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1answer
1k views

How to monitor current output/receive queue length in Linux

I want to check the capacity and performance of my network. Besides checking the txkB/s and rxkB/s via Sar, I'd also like to see the average queue length of the network interface(so that the average ...
0
votes
1answer
782 views

How to monitor real time sendq and recvq sizes

netstat -an will give the recvq and sendq on a particular connection. When I have an application (in this case a dumb echo server) listening on a port and I put the load on and run netstat in a loop, ...
3
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4answers
10k views

Graph VMware ESXi through Cacti

I have a server running VMware ESXi 4.1.0 and while I love the graphs within the vSphere Client, they provide no historical data with the license I have. Also, all my other servers are monitored via a ...
2
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5answers
569 views

Figuring out what's causing a server to slow down

I have a potential client that has a php site that performs fine most of the time. However, every week or so, it will experience lag (slow page loading). I am sure there are a myriad of things that ...
2
votes
3answers
718 views

netstat issue: cannot pipe output from 'netstat -c' to an nfs mount

Short version: Netstat works fine except when I redirect output to a file in NFS. doesn't work: netstat -c > /nfs/mount/file works: netstat > /nfs/mount/file works: netstat -c works: ...
3
votes
2answers
2k views

How do get apache display url request in Top and PS?

Is there a way to get apache to display the url that it is handling in top and ps? This would help us nail down performance issues much more faster. Thanks.
1
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1answer
1k views

Zenoss: Getting SNMP stats over SSH

I have the SSH connection working. I have it successfully modeling the device (Ubuntu Server, in this case). What I can't get to work is the SNMP portion. It sounds like I have to custom add the ...
1
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1answer
236 views

How can I trace performance problems in an Ubuntu / Apache / MySQL / Rails + Passenger stack?

I have performance issues with a Rails stack that is running Apache 2.2.9, MySQL 5.1, Passenger 2.2.9 and Rails 2.3.8 (ruby 1.8.7-p72) on an Ubuntu 8.04 server. How can I trace performance issues in ...
3
votes
1answer
696 views

Processor(_Total)\%Idle Time inconsistent with Processor(_Total)\%Processor Time

I'm trying to monitor total CPU usage on a Win2k8 R2 server using Performance Monitor. I'm running in HyperV VM on a 12-core system but only a single hyper-threaded core is allocated to this image ...
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1answer
204 views

Measuring SQL Server performance improvement

We just got approval to purchase a new database server. My manager is worried that, after we deploy the new server, some users might not perceive the improvement in performance. I've been tasked to ...
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3answers
2k views

Nagios Best Practise [duplicate]

I have installed Nagios on my network, and I have some beginner questions. I would like to get some "best practice" information about the following types of server: Web Server Exchange Server ...
3
votes
1answer
181 views

Overhead of Perfmon -> direct to SQL Database

HI All, First up, I'm a total newb at Performance Monitoring. I'm looking to set up central performance monitoring of some boxes. 2K3 TS ( Monitor General OS Perf & Session Specific Counters ) ...
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5answers
174 views

Looking for application performance tracking software

I have multiple java-based applications which produce statistics on how long method calls take. Right now the information is being written into a log file and I analyse performance that way. However ...
0
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1answer
602 views

I want to measure memory usage of an application over time. How do I do it?

I want to use PerfMon to measure memory usage of the application over time, however, there are more than dozen Memory related counters. Which one will give me an accurate picture?
1
vote
3answers
560 views

Any open source software for measuring & monitoring MySQL performance?

I'm working on improving the performance of a MySQL server. I'm looking for something to measure & monitor the performance of MySQL (as query per second) over time so that I can measure any ...
1
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2answers
252 views

Monitoring multiple networks

I'm looking for a (or multiple if needed) system with web interface to monitor a number of remote networks. All of these networks contain multiple clients, servers, routers, switches, printers, ... ...
0
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4answers
227 views

Recommendations for monitoring and logging system resources?

I'd like to have the ability to log and record various resources: CPU, memory, disk IOPS, etc of a machine so I can test its capabilities. The purpose of this software is to test my own applications ...
2
votes
2answers
2k views

Can anyone recommend utilities to measure response time of a Windows Terminal Server?

Users are currently experiencing performance problems when using RDP to connect to Windows Terminal Servers. Even users connected to the data centre directly on fibre link are experiencing problems, ...
1
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2answers
236 views

What webapps are available to monitor my VPS?

I would be interested what webapps do you know/use that allows you to monitor VPS. I would like to have the following metrics, CPU, Memory, Disk stats, Apache stats (hits/sec, free agents) Thanks
0
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2answers
1k views

Is there a way to use Performance Monitor on Windows Server 2008 R2 to send an email when free RAM is low?

Very rarely, our server runs low on RAM (and crashes) due to a certain rogue app that gobbles up all of the RAM. To guard against this happening again, is there any way to configure the built in ...
1
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3answers
471 views

What range is considered safe for connections/GETS/SETS per second per server instance with memcached?

Question I am interested in learning the following metrics, per memcached instance: Safe range for connections/GETs/SETs per second Upper bound for connections/GETs/SETs per second I have a ...
6
votes
5answers
3k views

Nagios Check that Simulates Web Full Rendering Time

Does anyone know of a Nagios plugin or cli program that can simulate the load time of a webpage as it would be in a browser. For example the resulting total load time of something like Pingdom's Full ...
0
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3answers
175 views

Recommended way to Investigating server performance issues

I have a linux server box that runs the following stack: apache 2.2.9 passenger 2.2.8 rails 2.3.8 MySQL 5.1 Recently we've encountered some machine performance issues, where the entire server ...
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2answers
3k views

VMWare Esxi Looking for Bottlenecks

I have a VMWare ESxi box, 22GB ram, Dual Quad Core Xeon, 2 Sas drives + Write caching raid controller etc. Anyways, have about 30 small XP VM's running on it and starting to get some very slow boot ...
2
votes
3answers
1k views

Munin Graphs - Have one graph/plugin only update once per hour?

I am writing a custom munin plugin/graph and it's slightly computationally expensive. It's also unlikely to change much in a few minutes. Is it possible to have this one graph/plugin only update once ...
0
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3answers
335 views

How do get the 'response time' à lá pingdom,etc?

I just received this report from pingdom: Ans was wondering how do they know the 'response time' information regarding the site. The GET request does not give that information.
2
votes
2answers
4k views

NFS I/O monitoring

I have a NFS mounted directory, and I'd like to monitor the I/O usage on it (MB/s reads and writes). What's the recommended way to do that ? This is the NFS client, I don't have access to the NFS ...