Nagios check for Varnish Backends
We recently starting using Varnish to cache un-authenticated requests to our web farm. It even has this great feature called grace mode, where it will keep ...
Recent Posts
Reduce javascript UI code with Django forms
Typically, I try to implement a dynamic UI feature without javascript on the first pass. Then, I layer in a little javascript goodness to make it more respo...
Profile and reduce memory use in Django with .iterator()
For the most part, objects allocated by Django are short-lived, and are eligible for garbage collection when the request ends. In our case, we also have som...
Django Performance: Latency Kills
Do you know how many database queries your Django pages are making? If you're like me, you probably don't know exactly. That's the beauty of the ORM; it abs...
Using pgpool2 to timeout idle Postgres connections from Django
Django has a well known issue with "<IDLE> in transaction" queries piling up. I have found that simply "<IDLE>" queries also have a tendency to ...
Varnish caching for unauthenticated Django views
Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other HTTP accelerators, such as Squid, which began life as a cl...
Django/Haystack: latitude/longitude radius search w/ SOLR
Haystack is a great indexed search framework for Django. Getting started is easy, and it includes many data types and facets out of the box. However, one da...
Celery: blacklists and custom formatting for exception emails
Celery 2.3 has a few high level knobs to turn with regards to exception emails. You can whitelist exceptions by type. You can change the recipients, email s...
Django: sticky URL query parameters per view
On pages that contain filter controls, such as search results pages, it's common for the filter selections to be put into the URL using query parameters. Th...
Django: exclude some views from middleware
In my Django applications, I tend to use custom middleware extensively for common tasks. I have middleware that logs page runtime, middleware that sets cont...