Category Archives: Perl

Perl-related

sv.pm.org: Moose (OO Perl)

Tonite at Silicon Valley Perl Mongers, Venugopal gave a talk on “Moose (OO Perl).” It was a dark and stormy nite, but a dozen members still arrived. Venugopal did a great job explaining how Moose works, with admirable patience. Moose … Continue reading

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Perl and Monotonic Time Functions

Perl on Linux supports the POSIX C clock_gettime() function to get the monotonic time (always increasing system time, except for variable overflow) values: Comparing monotonic time values: avoid problems with leap seconds going backwards in time by NTP, but can … Continue reading

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Perl Petstore Enhanced REST API Framework

I’ve been doing a lot of work with REST APIs and microservices, so I decided to write a complete REST API framework in Perl based on the Mojolicious and Swagger2 Petstore sample. You can git clone the repo and add … Continue reading

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Notes on Upgrading from CentOS 5 to CentOS 7

If CentOS 5 or 6 still work fine for you and you’re happy with the security updates you’re getting, then there’s no pressing need to upgrade. I had motivation (to use the Cairo graphics libraries) to upgrade some web servers … Continue reading

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Poor Man’s Profiling with the Linux ts Command

Sometimes when you’re investigating server performance issues, you don’t have the luxury of a full development suite installed with tools like a profiler. It turns out that the linux ts command, included in moreutils, can be surprisingly helpful. It can … Continue reading

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