A collection of various limits and related factoids about the Matrix specification and implementations.
The content has been adapted from the spec itself.
- Events must not be larger than 64 KiB when formatted as a PDU
sendermust not exceed 255 bytes (including domain)room_idmust not exceed 255 bytesstate_keymust not exceed 255 bytestypemust not exceed 255 bytesevent_idmust not exceed 255 bytes
- User ID
localparts are
limited to
[a-z0-9-.=_/]+in the spec, but historical user IDs can contain any printable ASCII except spaces and federation allows arbitrary unicode including unprintable ASCII
- Events table used to use a 32-bit stream ordering
ID, limiting a server to a
total of 2^31 (2,147,483,648) events across all known rooms (develop has
changed to
bigint, so the limit will soon become 2^63)
Contributions welcome! 😄 Read the contribution guidelines first.
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