This variable determines the number of indexed block buffers to allocate on the client (if used in a runtime configuration file) or on the server (if used in the server configuration file). These buffers are used to improve the performance of indexed files. Each buffer is 512 bytes plus some overhead. Setting this number larger will generally improve file performance. Setting it smaller will save memory. The value can range from 0 (no buffering) to 2097152. The default value for use with AcuServer is 64.