Diagnosis
Before query-specific data (tables and structures) is written to thecache, an internal conversion (an export) to a standard format takesplace. Until now, this format was XSTRING. Since the conversion toXSTRING can have a negative impact on performance, particularly whenlarge volumes of data are involved, it is now possible to convert to aninternal table. This does not have the same performance issues.
Conversion to the internal table can currently only be used with clustertables and the main memory or shared memory (the structure of which isbased on a cluster table). This is because it is not possible to storean internal table easily in BLOB fields of tables or flat files.
This setting applies to all cache modes only; an exception to this isthe query aggregate cache, which operates like a new cache. This usesconversion to an internal table from the onset.
You can currently change this parameter using reportRSR_CACHE_SWITCH_EXPORT_MODE only. This is because data also has to bedeleted from all old cache modes since it is not possible to converteach of these formats into the other format. By default, the parameteris active. We recommend that you keep this setting.