30000 x 384 float32 = 46 MB of raw vectors. PSS = proportional set size of the service's processes, read from /proc, after loading and querying.
store             PSS MB   size of the loaded data, as the store reports it
pgvector             153   table+toast 59 MB, hnsw index 59 MB
redis                422   used_memory 434 MB for 30000 keys (everything lives in RAM); one document = 10600 bytes; vector_index_sz_mb=55.4
qdrant               172   storage dir 144 MB
elasticsearch       1550   index store.size/docs.count [{"store.size":"54.3mb","docs.count":"30000"}] (JVM heap fixed at -Xmx1g)