Hello folks. Long long ago in the days of slow disk arrays and filesystems that serialized file access, I wrote a blurb on "checkpoint not complete." It is here: http://www.speakeasy.org/~jwilton/oracle/checkpoint-not-complete.html Please enjoy. BTW, I would enjoy a debate on the question of "how many caches do we need to run Oracle?" Oracle Buffer Cache UBC/filesystem cache Async write queue Disk array hardware cache More? less? Will data ever be on disk or is the database just imaginary? -- Jeremiah Wilton Independent Oracle Professional Oracle Certified Master Disaster Recovery - Seminars - Technical Interviews http://www.speakeasy.net/~jwilton -- //www.freelists.org/webpage/oracle-l