doc.FAQ.WhatFactorsContributeToPerformanceProblems Use of OpenLink 's older 1.x and 3.x drivers. The RPC communications layer--contained within newer, OpenLink drivers--was redesigned for enhanced performance. Use of OpenLink 's Multi-Tier drivers when use of Single-Tier drivers is possible. Single-Tier drivers boost performance. Use of sockets connectivity where shared memory connectivity is possible. Retrieval of large, binary objects. Non-use or misuse of the Row Buffer Size DSN attribute. Use of less efficient cursor modalities. Poor use of indexes and table structuring.