TvGuide grabber is run automatically. After grabber was ready, PC got very slow:
1. TvGuideScheduler was eating memory and stopped at approx 425MB
2. MediaPortal (playing music) was taking about 150MB
3. TvService approx 25MB with aprox 30% CPU
4. SqlServer approx 25MB with apporx 25% CPU

After TvGuideScheduler was finished:
1. MediaPortal (still playing music) went down to 60MB
2. TvService down to 0% CPU
3. SqlServer same.

h4. Steps to Reproduce
Just run TvGuide grabber