@Amaury, @ JockTodd
I believe both registry keys should be REG_DWORDs. REG_SZ will cause the SDK service to crash.
@Kevin
I just tried setting DALInitiateClearPool = "true" as a REG_SZ and the "System Center Data Access service terminated unexpectedly" after only a few seconds. The Operations Manager Event Log confirmed it with EventID 26380, OpsMgr SDK Service "...System.InvalidCastException: Specified cast is not valid...".
It took me a few minutes to realise this was the cause, so you might want to warn about this in your upcoming blog.
And thanks for your many informative blogs. I've been finding a lot of useful tips in them.