Does anyone know a low memory disk based search solution for home usage? By low memory i mean in the range of 256MB maybe 1GB. I am almost convinced of mellisea

Does anyone know a low memory disk based search solution for home usage? By low memory i mean in the range of 256MB maybe 1GB. I am almost convinced of mellisearch but still looking. Elasticsearch would have been perfect but the memory usage is too high for the server i have. Or should i go with a custom solution? FYI the search is highly dynamic ranging from full books, medical records, chat messages to movie/shopping/recipe catalogue.