We checked now some times the performance of german 1&1/puretec provider. The moodle compatibility test says all right. But we found some problems:
- themes are not correctly shown after some time
- no support for backup
- no support for the delete of a course.
We spoke with the support of the provider. They can't explain the problems and say the are not the right people to solve script problems of moodle.
We tested the same installation on other servers and got no problems.
Our consequence: we change to an other webspace provider.