Execute.sleep(8000);
GroupedSearchResults newGsr, gsr;
float newHitRatio, hitRatio;
newGsr = cacheSearcher.search(new MatchAllQuery(),0,3,new StoredFieldGroup("group"),2,null,new FieldSort(false,"group",FieldSort.OrderType.STRING));
newHitRatio = cache.getHitRatio();
for (int i = 0; i < 20; ++i) {
gsr = newGsr;
hitRatio = newHitRatio;
newGsr = cacheSearcher.search(new MatchAllQuery(),0,3,new StoredFieldGroup("group"),2,null,new FieldSort(false,"group",FieldSort.OrderType.STRING));
newHitRatio = cache.getHitRatio();
assertTrue(gsr == newGsr);
assertTrue(hitRatio < newHitRatio);
}