MemWAL Index

The MemWAL Index is a system index that serves as the centralized structure for all MemWAL metadata. It stores configuration (region specs, indexes to maintain), merge progress, and region state snapshots.

A table has at most one MemWAL index.

For the complete specification, see:

• MemWAL Index Overview - Purpose and high-level description
• MemWAL Index Details - Storage format, schemas, and staleness handling
• MemWAL Index Builder - Background process and configuration updates