Netezza – InvalidateSharedInvalid: handled cache state reset
You may see messages like below in postgres logs (/nz/kit/log/postgres/pg.log):
DEBUG:InvalidateSharedInvalid: handled cache state reset
This is just a informational message and no action is required.
Reason why you see this message is because during system activity Netezza cache the catalog information. At a point in time when system finds that the catalog information cached is now obsolete it resets the cache information. When this reset happens it writes this informational message in postgres logs.
More frequent your system catalog changes more frequently you see these messages in pg.log