Modeling servers for resource consumption

re: Modeling servers for resource consumption

pradeepchellappan — Sat, 09 Dec 2006 02:57:07 GMT

Could you please change the font, its almost unreadable :(

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Sam Gentile — Sun, 24 Dec 2006 19:47:04 GMT

A special Christmas Eve version to clean out my Feed Demon box as I will be on vacation next week and

re: Modeling servers for resource consumption

sambo99 — Thu, 04 Jan 2007 07:54:50 GMT

Second vote on the font, white on black is really hard to read.

We have also seen many issues with resource usage in the past with our app. DataSets are a really common way to get these issues, you fill up a DataSet with "select * from table" which in Dev is really small but in production has millions of rows, and boom.

These issues are really tricky to debug, in general we use windbg + sos to debug this stuff. Scitech's ".net memory profiler" is another option, but in general windbg is faster.

In some rare instances we have seen heap fragmentation, but this is not the general case.

The hardest issues we have had to debug are the unmanaged leaks in our app.

Regarding slow communication lines, many of the more expensive hardware routers can be configured to simulate a slow link. There are also a few software options out there. Perhaps the underlying libraries should also provide the ability to run in test mode where they slow down comms for all the .net provided comms stuff.

An idea that I think is probably not that good but may be worth exploring would be for the GC to swap Gen2 objects to the disk if its nearing fatal mem usage (swapping least used objects first)

re: Modeling servers for resource consumption

Patrick Dussud — Thu, 08 Feb 2007 05:17:43 GMT

This is a very good comment. I am preparing a blog entry to give techniques to deal with the scenario you are talking about, within certain limits. Persisting objects to the disk under the cover is hard. We don't know which objects are used the least and it is hard to be totally transparent. Obviously this is possible, a number of in memory object databases are doing just this but it always entail a non trivial performance loss for the common case. Some application specific measures are generally cheaper and can be targeted to just a specific part of the object population where the tradeoff between performance and memory footprint can be shifted correctly

Limiting resource consumption on servers.

CLR, architectures, and stuff — Wed, 09 May 2007 03:19:49 GMT

In my last blog entry I described the problem of servers over committing resources. There are several

re: Modeling servers for resource consumption

dipbi — Thu, 19 Jun 2008 00:23:25 GMT

Could you comment on garbage collection mechanisms on network performance monitoring agents and their effect on management of agent lifetime and application throughput ?

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Sam Gentile's Blog — Tue, 02 Dec 2008 21:59:59 GMT

A special Christmas Eve version to clean out my Feed Demon box as I will be on vacation next week and then in Belgium for a week after that so don't expect much if any blogging. CLR Modeling servers for resource consumption Windows keyed events, critical