Maximum total metadata size in bytes per record.
Pinecone free tier: 40 KB. Paid: 40 KB default.
Records exceeding this will have large fields truncated.
OptionalmaxMetadataFields
maxMetadataFields?:number
Maximum number of metadata fields per record.
Some providers cap this (e.g. Pinecone: no hard cap but
performance degrades past ~40 fields).
Maximum total metadata size in bytes per record. Pinecone free tier: 40 KB. Paid: 40 KB default. Records exceeding this will have large fields truncated.