While I certainly like the fact that Postfix becomes more and more "admin friendly" in that it now also logs warnings about performance issues, I'd like to know how many milliseconds a single request to update the temporary whitelist may take before a warning is emitted.
Is it 100ms? I got exactly 882 messages like postscreen[5486]: warning: ps_dict_put: /var/lib/postfix/ps_cache.db update took 108 ms with values ranging from 101 to 147 within the last 24 hours on a moderately busy system. Probably unrelated: When does postscreen(8) clean up it's database? Periodically? Every X connections? Never? What database sizes are to be expected? Stefan