Finished all the OSDL DBT1 tests, and noticed that compressed caching does not help this scenario. It does not access disk so much, and disk is not its bottleneck. That is a pity, because such an application would be nice to have a performance gain.

I also could run OSDB, the Open Source Database Benchmark. I mean, I had already run it, but now I could run in the multithreaded disabling the creation of hash indexes in Postgres. Tiny performance gains. Not a good day for my new performance tests.

In the night I left the computer running the complete test suite with a compressed cache which used WK4x4 compression algorithm (download here), the algorithm from Wilson-Kaplan compression algorithm family for process data segment.

I still have to run some tests for a meeting with my advisor today. I guess we are pretty close to finishing all the tests and we should put a great effort into making the dissertation good enough for submission. It is a pain in the ass to be stuck with this, unable to spend time developing interesting stuff.

For people who does not love hot weather like me, check the weather forecast in Sao Paulo. It is 27 degrees Celsius (81F) at 9h AM. In the room I am now, probably it is over 30C (86F).