similar to: Mongrel Performance Tuning questions

Hello all, I''m attempting to test/tune a mongrel cluster according to the tuning instructions on the mongrel site (using httperf). Anecdotally, the site itself ''feels'' snappy, but testing it with httperf reveals what appears to be terrible throughput. I''m kind of at a loss to describe the results, and was hoping someone could verify that I''m testing

Howdy Folks, This release is after painstaking analysis of a memory leak that was reported by Bradley Taylor, reduced by myself, and then fixed after much work. You should all thank Bradley for finding the bizarre fix. It turns out the Ruby has a memory leak when you use pretty much any thread locking primitive other than Sync (Mutex, Monitor, etc.): http://pastie.caboo.se/10194 The fix (for

I''m trying to do some initial benchmarking of our setup, mainly just to establish baselines. I''m essentially using the process Zed outlines in a previous message: http://rubyforge.org/pipermail/mongrel-users/2006-May/000200.html What I''m running into is that Mongrel appears only half as fast as Apache when serving a small static HTML file. If I then add in Apache with

Hi! I''ve been following the new mongrel tuneup guide (a huge thanks for that btw) and here are my results. I''ve basically only gotten to the point where I''m tuning up 1 mongrel because I suspect I have a performance problem with my rails app. http://mongrel.rubyforge.org/docs/how_many_mongrels.html The first number is the 10s nconns and the second is the max req/s as

is there a way to determine how best to determine the number of mongrel processes to start? Right now i am running 2 in production but I see some people run about 8 or so. What is the cutoff and determening factor for this ? thanks adam -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi all: New to the list. Im enjoying mongrel. Coming from a background of weblogic clusters this is a dream. However I have a few questions: I have used HTTPerf to analyze metrics for an application ( rails ). My question pertains to the CPU utilization threshold: 1) Test with single mongrel server : sustained cpu util @ 98% 2) Test with 2 mongrel nodes in a mongrel cluster with apache and

I''ve been trying to track down the culprit of erratic behaviour and crashes on my production server (which is split into a number of Xen instances), so set up a staging server so that I could really try to get to the bottom of it. The staging server (also split with Xen) is set up pretty much identically as far as the mongrel_cluster server is concerned (the production box has two

Hi, Thanks Zed - this is very interesting. One item in particular caught my eye: Does anyone on this list have any comments or validation that Rails 1.2.1 is 2-4 times as slow as Rails 1.1.6? Topfunky provided a link that purports what looks like really horrible performance and memory characteristics for Rails 1.2.1, even v. 1.1.6:

Hello Everyone, Francois Simond inadvertently found a way to replicate a rare but deadly bug right as I was working up the official release of Mongrel 0.3.13. This bug only happened to a few people, but thanks to the wonderful fuzzing tool Apache Bench[1] he could replicate the slow select starvation people were seeing. TESTING This bug is now fixed in the current pre-release, and I''d

Hi all, Tried out the mongrel upload progress plugin with Drb and it works great on my OSX development box, but when putting it into production (Ubuntu Dapper), uploads complete but the app isn''t returning any values for upload progress, and uploads are not showing up in the queue when running upload_client.rb. Before anyone asks, yes, I''m running both the mongrel instances and

Hi, Is anyone here using smb:// URLs to access "Windows" shares? I've been doing this for a while with common file systems at work, and it used to work just fine. Then I while back, I started getting issues; I will now just keep getting asked for a password when I try to access something through smb://. I thought at first that this meant there had been some kind of change

A recent message on ansari.test() prompted me to play with the examples. This doesn't work for me in R version 2.4.1 R> ansari.test(rnorm(100), rnorm(100, 0, 2), conf.int = TRUE) Error in uniroot(ab, srange, tol = 1e-04, zq = qnorm(alpha/2, lower = FALSE)) : object "ab" not found It looks like there's a small typo in ccia() inside ansari.test.default() in which

I have a data.frame object like: > data.frame(x=c('A','A','B','B'), y=c('Ab','Ac','Ba','Bd')) x y 1 A Ab 2 A Ac 3 B Ba 4 B Bd how could I create a tree structure object like this: |---Ab A---| _| |---Ac | | |---Ba B---| |---Bb Thanks, Zech [[alternative HTML version deleted]]

Hey Everyone, Topfunky (Geoffry) has created a great PeepCode screencast on using httperf to performance measure your web applications: http://nubyonrails.topfunky.com/articles/2007/03/05/peepcode-page-caching-and-httperf http://peepcode.com/products/benchmarking-with-httperf Topfunky put a ton of work into this and really got it right. The attention to detail is very good and he researched

Windows 7 (local computer) Windows server (server I am trying to reach) I need to read a file whose windows path is of the form \\Theserver\mydirectory\data.csv You will note that as per windows standards the server name is preceded by two backslashes. I am not sure how to specify this in R. One usually needs to specify an escape characters in a path new which would suggest my path should

Hello, I''m running a Rails application which must sort and manipulate a lot of data which are loaded in memory. The Rails app runs on 2 mongrel processes. When I first load the app, both are 32Mb in memory. After some days, both are between 200Mb and 300Mb. My question is : is there some kind of garbage collector in Mongrel? I never see the two Mongrel processes memory footprint

Hi, has anyone run httperf in Xen.if so cna you share the peformance. Also can someone please send me the source for this. the HP site that hosts it does not respond and i do see any other sites that have the source for httperf. Thanks PKrishna _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi, I created the model below, which returns me the following warning message: In sem.default(ram = ram, S = S, N = N, param.names = pars, var.names = vars, : Could not compute QR decomposition of Hessian. Optimization probably did not converge. ######### Model ######## mDPDF = data.frame(mj1,mj2,mj3,mj4,mj5,eL1,eL2,eL3,eL4,eL5,aC1,aC2,aC3,aC4,disR1,disR2,disR3,disR4,disR5,

I have two datasets: A with columns Open and Name (and many others, irrelevant to the merge) B with columns Time and Name (and many others, irrelevant to the merge) I want the dataset AB with all these columns Open from A - a difftime (time of day) Time from B - a difftime (time of day) Name (same in A & B) - a factor, does NOT index rows, i.e., there are _many_ rows in both A & B with

Hi all, I''ve been spending quite a lot of time trying to install a decent RoR server on my dedicated server (Ubuntu 6.06 LTS), and now, everything works. However, the performances are not really what I had expected... I would like to know what you think about it. Here is my config: 2GHz VIA proc, 1Gb RAM, SATA-II HD. I have apt-got ruby 1.8.4, mysql5 and installed rails 1.1.4 by