Redis Memory Optimization

Redis keeps all its data in memory, and so it is important to optimize memory usage. This document explains several strategies to reduce memory overheads.

h2. Use 32 bit instances

h2. Avoid multiple databases

h2. Use Integer IDs

h2. Avoid Strings smaller than 100 bytes

h2. Use key expiry judiciously

h2. Optimize for small maps, lists and sorted sets

h2. Integer Sets - 16, 32 or 64 bits

h2. Use lists instead of dictionaries for small, consistent objects

h2. Use Bitmaps to encode data

h2. Create your own data types