Change Redis to 25k.

doc/install/requirements.md

@@ -89,7 +89,7 @@ If you want to run the database separately, the **recommended** database size is
 ## Redis and Sidekiq
 
 Redis stores all user sessions and the background task queue.
-The storage requirements for Redis are minimal, about 1kB per user.
+The storage requirements for Redis are minimal, about 25kB per user.
 Sidekiq processes the background jobs with a multithreaded process.
 This process starts with the entire Rails stack (200MB+) but it can grow over time due to memory leaks.
 On a very active server (10.000 active users) the Sidekiq process can use 1GB+ of memory.