Post thumbnail of Using dd to search for strings in memory or devices
6 May 2009
Continue reading Using dd to search for strings in memory or devices

Using dd to search for strings in memory or devices

The problem is, hexdump will give you 16 ascii characters surrounded by pipes and then a newline before printing the next 16. You can’t search for long strings that way…

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Post thumbnail of Trimming down an Apache server, blindfolded
22 January 2009
Continue reading Trimming down an Apache server, blindfolded

Trimming down an Apache server, blindfolded

Here’s my notes from trimming a little off the top of an apache server. This was just a quick chop at the default install. I haven’t looked at how the webapps are used or how many connections or the length of time per connection or anything… I’ll go back later and tweak how many threads and processes are started and used.

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Post thumbnail of Java, Eclipse, gij, icedtea, ahh memory error no more
13 January 2009
Continue reading Java, Eclipse, gij, icedtea, ahh memory error no more

Java, Eclipse, gij, icedtea, ahh memory error no more

Eclipse and gnu’s crappy java, otherwise known as gij, don’t seem to get along. Even when you give gij tons of memory using vargs -Xmx1024m when launching eclipse, it still just seems flaky. So I tried java’s Icedtea 1.7.0 and my memory crisis went away.
To see which jvm …

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Post thumbnail of Apache on a diet: Tune for optimal memory usage and speed
1 January 2009
Continue reading Apache on a diet: Tune for optimal memory usage and speed

Apache on a diet: Tune for optimal memory usage and speed

Lets get a running start… Make sure KeepAlive is set to ‘On’, HostnameLookups is ‘Off’ and comment out most of the modules loaded in your default Fedora, Ubuntu, Suse, other bloated distribution’s choice for default modules. Most of them you won’t need or want to have available. You’ll probably need rewrite and php, …

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