Use Redis (Redis2) to store sessions

[François Marier]

Using Postgres to store sessions is usually not a good idea from a performance point of view due to the large amount of writes (and therefore dead rows) that it generates.

From the Postgres slow query log:

  2011-09-19 08:57:40 UTC LOG: duration: 519.585 ms statement: UPDATE "django_session" SET "session_data" = E'gAJ9cQF...', "expire_date" = E'2011-10-03 08:57:40.084661' WHERE "django_session"."session_key" = E'e7b475d9c...'

Redis2 is not in squeeze, but it's in squeeze backports.

[François Marier (fmarier)]

Here is Instagram's implementation:

  https://gist.github.com/910392

as mentioned on their blog:

  http://instagram-engineering.tumblr.com/post/13649370142/what-powers-instagram-hundreds-of-instances-dozens-of

[François Marier (fmarier)]

Here's a brief intro on using Redis on Debian:

  http://www.debian-administration.org/article/A_brief_introduction_to_the_redis_data-store