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10
votes
2answers
465 views

What's difference between monitoring, tracing and profiling?

I have seen these three words showing up a lot, but don't understand the exact differences between them. For example, collecting CPU utilisation is often called profiling and can also fall into ...
10
votes
1answer
195 views

how to do I/O sniffing

For sizing purposes I need to understand what requirements an application has to the I/O subsystem. I would love to do what I call I/O sniffing and obtain a list of events from the block layer like ...
4
votes
4answers
5k views

Profiling Apache+Mysql+Php server - which is the bottleneck?

How do I profile an Linux + Apache + Mysql + Php server for speed? I have a server with a heavily modified MediaWiki instance running on Ubuntu 8.04. It's a bit sluggish - I haven't done anything to ...
4
votes
6answers
3k views

What consumes memory in java process?

we are trying to investigate memory usage of java process under moderate load. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 12663 test 20 0 8378m 6.0g 4492 S 43 8.4 ...
4
votes
5answers
2k views

Find which pages cause load?

I'm not normally a sysadmin, but I've got a production server under heavy load (serving some basic php pages, and some php redirect files that have some sql queries, and no images) that keeps ...
3
votes
4answers
221 views

“Catch All” Server-Side Load Profiling

If I have an infrastructure with some Web Servers (Windows 2003 and IIS) and a Database (SQL Server 2005) and ASP.net, I wonder if there is a catch-all tool that simply allows me to say "Ok, I now ...
3
votes
5answers
993 views

Linux server performance profiling - how to see what caused high load

If a server is experiencing high load, I use top and similar tools to troubleshoot why. However, this is only effective if I can analyze while the server is experiencing the problem. What are some ...
3
votes
3answers
257 views

How to profile for HDD usage pattern?

I'm considering upgrading the storage system for some of my servers, and all the guides and manuals advise to consider the storage usage patterns of your app before deciding on a (RAID? SSD? iSCSI? ...
3
votes
2answers
1k views

How can I check if my DB needs more RAM?

How would you check if your postgresql DB instance needs more RAM memory to handle their current working data?
3
votes
3answers
546 views

How to find virtualization performance bottlenecks?

We have recently started moving our C++ build server(s) from real machines into VMs. (MS Hyper-V) We have some performance issues that I've currently no idea how to address. We have: Test-Box - ...
3
votes
1answer
570 views

Celery - minimize memory consuption

We have ~300 celeryd processes running under Ubuntu 10.4 64-bit , in idle every process takes ~19mb RES, ~174mb VIRT, thus - it's around 6GB of RAM in idle for all processes. In active state - process ...
2
votes
3answers
3k views

A definition for a CPU second?

Hey, I'm totally behind this topic. Yesterday I was doing profiling for some script I'm working on, and the unit for time spent was a 'CPU second'. Can anyone remind me with the definition of it? ...
2
votes
3answers
660 views

Apache and high load avg

I have an odd problem I am not sure how to analyze further - there is a pretty lighweight website running on a pretty good box(Xeon, 4Gb ram, SATA). Judging by access logs, it get's about 120 requests ...
2
votes
1answer
598 views

Performance testing servers: How to characterize performance?

I need to purchase servers, and need to understand the right way to specify them. Based on the answers to this question, there are several parameters to take into account: CPU speed + Number of CPU ...
2
votes
2answers
188 views

MySQL Query Profiling for Indexes

Is there a way which I can have MySQL record its queries and their Explain so that I can figure out how to index the expensive stuff? I'm new to this stuff. Thank you.
2
votes
2answers
479 views

Visual Studio Profiler In Virtual Machine

I am unable to profile any application using Visual Studio profiler in Virtual Machines. I have used Virtual machines of Amazon EC2 at work and Virtualbox, Vmware at home. Also I have used AMD ...
2
votes
1answer
88 views

Profiling windows performance

I am used to using profilers for software development. I have had multiple windows pcs which all have slowed down over time, as well as had work PCs become slower. I understand this is probably the ...
2
votes
1answer
545 views

Why does “commit” appear in the mysql slow query log?

In our MySQL slow query logs I often see lines that just say "COMMIT". What causes a commit to take time? Another way to ask this question is: "How can I reproduce getting a slow commit; statement ...
2
votes
0answers
423 views

Source of 'Failed to CoCreate profiler' event log

I have a Win Small Business Server 2003 box that has started regularly logging event ID 1022, "Failed to CoCreate profiler". There's no obvious pattern to when this happens, other than several times ...
2
votes
5answers
132 views

What do these profiling results mean?

I'm trying to switch a site from an old CMS to WordPress. I ain't got root. I can't install extensions. Vanilla PHP 5 install. So I just put microtime on each end, topped it off with ...
1
vote
4answers
650 views

Will running RRDtool or Cacti slow down my servers performance?

I'm consider running some performance profile tools like Cacti for my server, but I'm concerned that running RRDtool or Cacti slow down my servers performance? Is this a valid concern for me? Or ...
1
vote
1answer
91 views

What profiling tool for Linux requires very little overhead?

I need a tool to profile a Linux application, but I can't seem to find any that have little overhead. (By overhead, I mean require a large download or disk space once installed.) I looked at valgrind ...
1
vote
1answer
42 views

How to profile which SQL server a .NET application tries to connect

We have a huge .NET application from 3rd party that would be time consuming to disassemble and understand the code. It is compiled in Release mode. Connection strings to the MS SQL databases are ...
1
vote
1answer
111 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
195 views

How to run truss with piped command in Solaris

How to run a truss command with piped output? eg. # truss -leDo /tmp/truss.out tar cvf - dirs/ | gzip -1 > archive.tar.gz I get only the "tar" output in truss, not from gzip!
1
vote
1answer
611 views

Unexplained CPU and Disk activity spikes in SQL Server 2005

Before I pose my question, please allow me to describe the situation. I have a database server, with a number of tables. Two of the biggest tables contain over 800k rows each. The majority of rows ...
1
vote
1answer
296 views

Send email from IIS on some action

Is there a way to send email on, let's say, application pool of some site stop? Or on IIS restart. So that I want see if something happened on remote server by receiving email, is there a method to do ...
1
vote
0answers
66 views

Best way to profile Unicorn workers?

I'm trying to get a better picture of what my Unicorn workers are doing. Are they blocked on calls to other services for a significant portion of their cycles? Are they free most of the time? The ...
1
vote
2answers
212 views

Looking for advice to find the bottleneck of Samba server

My LAN structure: A PC acts as a Samba client, IP: 192.168.1.12 A NAS router which runs a Samba server, IP: 192.168.1.1. The NAS router uses a USB key as its storage device and the USB has a 15MB/s ...
1
vote
2answers
604 views

Diagnosing poor performance on IIS / ASP.NET / MSSQL app

I'm trying to diagnose the cause of poor performance from a third-party web application we've deployed; the environment is: ASP.NET on IIS, Windows 2003 Server SQL Server 2008 on a separate Windows ...
1
vote
1answer
633 views

XDEBUG/PHP doesn't dump profile even when set up properly?

I installed xdebug from source, but also tried my package manager (separately) and they both are loaded correctly (verified by restarting Apache and seeing the xdebug copyright info in phpinfo()) but ...
1
vote
1answer
126 views

Bacula optimization/profiling tools

I'm trying to get an idea of where the bottlenecks are in our backup system. Are there tools available for profiling this? If not, any pointers to a home grown method would also help. I guess most ...
0
votes
1answer
91 views

How to investigate requests per second that are coming in?

If I have a server that is running Nginx + Passenger (mod_rails) how would I figure out how many requests a second are coming in?
0
votes
2answers
250 views

Server I/O climbs, bandwidth peaks, server locks, where to start?

I'm using Linode to host a Wordpress blog with an eCommerce plugin named 'Shopp'. I moved the site just a few days ago from a previous shared hosting account (with less resources than the Linode ...
0
votes
1answer
57 views

Raw hardware utilization profiling

Looking for a way to profile hardware utilization. While it'd be nice to correlate the utilization to the cause of the hardware being use, at this point I'm more interested in as detailed as possible ...
0
votes
2answers
1k views

SQL Server: Index utilization statistics?

Is there a way in SQL Server to get a report of index usage? i know starting with SQL Server 2005, you can get reports of top resource-using queries, based on what's in the Plan Cache: i'm curious ...
0
votes
0answers
9 views

How can I conduct profiling Ubuntu 12.04 from OS Windows 7?

There are Windows 7 on one computer and Ubuntu 12.04 on another. I use WinScp for copying files and TightVNC for work with graphic display (from Windows). I want to estmate the IO performance in ...
0
votes
0answers
121 views

Cisco 7206vxr cpu reducing

I have a 7206VXR (NPE-G2) . At the rate of 140 kpps i gain 80% of cpu . So i looking for ways how to reduce it? So i want to turn off netflow(but don't want to this,monitoring is highly important for ...
0
votes
1answer
226 views

Get system information from multiple computers via bootable USB device

I am looking for something similar to what is posted in this question: Linux + get the all information about the hardware from machine by tool or script Basically - I want to be able to plug in a USB ...
0
votes
1answer
752 views

Problems to connect Java visualVM to a EC2-instance

I'm trying to profile a AWS EC2 instance via visualVM. The instance is in a securitygroup which allows all connections and i'm runing jstatd with a grant codebase ...
0
votes
1answer
443 views

What's throttling the database?

Hardware: Intel x86_64 with 192GB of RAM. OS: CentOS 5.4 x86_64. DBMS: DB2 v. 9.7.1 64 bit. During certain special workloads (e.g. parallel REORGs/RUNSTATs), I've seen the server transporting ...