Ingres 9.2 Migration Guide - Actian

Visual DBA FeaturesVisual DBA FeaturesVisual DBA features in Ingres II 2.5 include:• DOM windows—new design and features• SQL/test—new design and features• Star management• Full Replicator management• ICE management• Enterprise access• Miscellaneous new featuresReplicator EnhancementsEnhancements have been made to the internal performance that concern thegeneric Replicator Server and increased replicator concurrency.Generic Replicator ServerIngres II 2.5 introduces a generic Replicator Server that is functionallyidentical to the custom repserver built by the user in previous releases. Thegeneric Replicator Server can automatically handle any table that is configuredby RepManager or Visual DBA without the need to compile or link a customexecutable.Increased Replicator ConcurrencyIn previous releases, updates to the Replicator shadow, archive, and inputqueue tables performed by the DBMS as a result of a replicated user updatewould use the same isolation level as the original update (serializable bydefault). This isolation level is unnecessary, since the unique key value in thebase table must have already been locked for the update to take place. In thisrelease, the isolation level has been decreased to read committed, allowing forimproved concurrency of replicated updates.222 Migration Guide