From: Tomas Vondra [mailto:tomas.von...@2ndquadrant.com] > 0.7% may easily be just a noise, possibly due to differences in layout > of the binary. How many runs? What was the variability of the results > between runs? What hardware was this tested on?
3 runs, with the variability of about +-2%. Luckly, all those three runs (incidentally?) showed slight performance decrease with the patched version. The figures I wrote are the highest ones. The hardware is, a very poor man's VM: CPU: 4 core Intel(R) Xeon(R) CPU E7-4890 v2 @ 2.80GHz RAM: 4GB > FWIW I doubt tests with such small small schema are proving anything - > the cache/lists are likely tiny. That's why I tested with much larger > number of relations. Yeah, it requires many relations to test the repeated catcache eviction and new entry creation, which would show the need to increase catalog_cache_max_size for users. I tested with small number of relations to see the impact of additional processing while the catcache is not full -- memory accounting and catcache LRU chain maintenance. Regards Takayuki Tsunakawa
