Erwin

43 ms·

391.
by Erwin 12y ago
PostgreSQL use a "top-N sort heapsort" for this. You can see that in effect when doing "EXPLAIN ANALYZE" on a query like this. Without an index you cannot avoid a full table scan. However the top-N heapsort avoids alloca
392.
by Erwin 12y ago
Apparently USB 3.1 -- called SuperSPEED+ (not to be confused with "Full Speed" (USB 1), "Hi-Speed" (USB 2) or "SuperSpeed" (without +, USB 3.0) supports up to 100 W. A toaster takes 800-1500 W. But you could ge
393.
by Erwin 12y ago
That map looks like high scores in an arcade game encouraging you to beat them. Can you beat the 276 km/h (!!) or 247 km/h on what seems to be a long tunnel or a bridge? Is there any documented effect of that data being public to
394.
by Erwin 12y ago
> 3 Samsung SSD 840 in single-volume RAID-1 configuration. A 3-way mirrored RAID? That seems like an odd setup, especially for a benchmark. I guess (?) reads could be faster with an additional drive, but the system had 1 TB of m
395.
by Erwin 12y ago
Around 20 years ago when I was taking my computer education, low-level programming was all there was. OS programming from absolute scratch is nothing special by the standards of what was done that day (some years later you had OS toolkits a
396.
by Erwin 12y ago
Volvo does have such a pedestrian airbag: https://www.youtube.com/watch?v=X2Aw4eZoijk Apparently that model has scored the highest Euro NCAP crash test as of 2012 (the NCAP tests tests both damage to drive AND pedestrians).
397.
by Erwin 12y ago
I learned something new from this: I was always under the impression that you could not do anything when your process is stopped via ^Z. But apparently there are two separate signals involved here: SIGTSTP (sent when ^Z is pressed and block
398.
by Erwin 12y ago
I was in Hamburg earlier this year, visiting among other things: http://en.wikipedia.org/wiki/Miniatur_Wunderland and I thought to myself, wouldn't it fun to play with those train routes again? I bought the "
399.
by Erwin 12y ago
Perhaps he's using it just as an X server. Around 15 ago, some of the other people on my systems programming team didn't care to run a fat Linux PC desktop -- they just had a X machine that booted over the network from a "bi
400.
by Erwin 12y ago
I enjoyed "Advanced Programming in the UNIX Environment" back when there we had multiple UNIX operating systems and probably more versions of standards than operating systems. Stevens carefully documented every detail (in a way wh
401.
by Erwin 12y ago
He described saturation as how much the processes want to use the resource beyond the maximum 100% utilization. E.g. if you look at load average on Linux, that's the size of the run queue (processes that are ready to run + blocking on
402.
by Erwin 12y ago
$50? It's also on Safari Online, where you pay 17 EUR per month for 6 months, then 23 (excl VAT) for being able to swap in and out 10 books.
403.
by Erwin 12y ago
Ken Thompson is 71: http://en.wikipedia.org/wiki/Ken_Thompson and he still has quite a go at programming.
404.
by Erwin 12y ago
Cheng did a "AMA" on reddit -- here are all the questions & answers in a convenient tabled form: http://www.reddit.com/r/tabled/comments/2693ur/table_iama_hi...
405.
by Erwin 12y ago
I'm sure that if they used IP-based geolocation, the headline would be: Swype connects to Swype servers almost 4000 times per day, reporting on user location. Unless you're suggesting that a complete IP->country database should
406.
by Erwin 12y ago
The ssh -W option -- which replaces netcat -- is relatively new. E.g. Redhat 5.x did not have it, nor did Ubuntu 10.04 LTS. Until OpenSSH 5.4 netcat was the way to do this sort of proxying.
407.
by Erwin 13y ago
I'm unclear on what you mean by "MITM... serving Javascript to EVERYONE". In a typical MITM scenario, you've logged into your coffee shop with an insecure network, or you are in some Middle Eastern country where all tra
408.
by Erwin 13y ago
Not quite as good though. The above will let just know whether you have the extension, but not whether you have the patched version, which can also be done from the CLI by using: echo -e "quit\n" | openssl s_client -connect se
409.
by Erwin 13y ago
Jarre did something similar in 83, making only one physical copy: http://en.wikipedia.org/wiki/Music_for_Supermarkets
410.
13 Steps to AngularJS Modularization(blog.safaribooksonline.com)
1 points by Erwin 13y ago|0 comments
411.
by Erwin 13y ago
FYI, the Digital Ocean tutorial writers get paid $50 to write them: https://www.digitalocean.com/company/blog/get-paid-to-write-... Looks like a great way for DO to both build a sense community and also appear hig
412.
by Erwin 13y ago
When you ship something to another country you likely have to specify a very precise code for calculation of toll / tariff, see e.g.: http://ec.europa.eu/taxation_customs/dds2/taric/measures.jsp... Which
413.
by Erwin 13y ago
That's for your own use however, the license says: Access to the data is restricted to employees and contractors of the license holder. With contractors, the license holder is liable should the contractors violate the terms of the agre
414.
by Erwin 13y ago
I use this PPA: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-... -- which has no Java files but can automatically install Java when it gets a new version. It seems decently up to date (though I wou
415.
by Erwin 13y ago
What kind of "encryption-at-rest" compliance industry or standard are you dealing with? I'm curious to where what AWS supplies suffices. As the encryption and decryption is, AFAICT, automatic and transparent, aren't you
416.
by Erwin 13y ago
Note that the compat mode may mean that you are miscounting IE8 users in IE7 compat mode as IE7 if you are doing a naive user-agent detection (I only mention it because I did and started blocking IE8 users!) Both will emit "MSIE 7.0&qu
417.
by Erwin 13y ago
I'd like to recommend this book to get a current overview of monitoring tools: http://www.amazon.com/Systems-Performance-Enterprise-Brendan... While most sysadm books are years out of date, this one covers all the hot
418.
by Erwin 13y ago
"atop" can do it to some degree. When you run atop interactively, it uses the process accounting facility to find out not what is running exactly when it takes a snapshot of the system, but also what processes started and exited s
419.
by Erwin 13y ago
Here's an informative post from reddit which covers some of the issues of why women might not speak up and not resist crass advances: http://www.reddit.com/r/changemyview/comments/1u9994/startin...
420.
by Erwin 13y ago
Selecting "Hobbit" also adjusts the generated height to around 3 feet!

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