I am using Quixote(2.4), scgi server (1.10) and durus (3.4.1). If I run with max_children more than 1 I get ReadConflict. I already trap conflict errors in the commit_changes method (and simply call connection.abort()) and all the messages are comming up within the start_request routine within Quixote. The problem is largely that all the images and javascript file requests arrive thick and fast, each one triggering access time updates on the session. I can reduce the impact by moving the application into a separate path and setting the session path accordingly. I might modify quixote to update the access time when it commits. However, these things reduce the potential impact and do not necessarily remove the problem. Forgive me if I have misunderstood something, but my understanding of what is going on centers on durus and conflict handling. The client.invalid set in the storage server records a list of oids that have been committed on behalf of other clients. If my client reads (or, in version 3.4 makes a change to) an oid in this list then a ReadConflict is generated. So, I have two processes, A and B. Process A reads, updates and commits oid 1. This places '1' in the invalid list relating to process B. When process B comes to read oid 1, after process A has finished and before anyone else can get in and clear the invalid list, it triggers a ReadConflict. If I have one process and attempt to read oid 1 twice in succession there is no error. If I have it right, it looks as though two sequential read/modify/write cycles on the same oid can cause an error in one circumstance and not in the other. In practice, I am only interested in what someone else is doing if I have already read the data and I now want to commit a change. This suggests to me that there ought to be a _sync when the oid is loaded (and throw away the invalid list) but the comments in get_stored_pickle seem to suggest that this has aleady been done. What have I not understood? Mike S. -- Mike Sandford Director Campbell Carr 12 Broadway Amersham HP7 0HP Tel: +44 (0)1494-432323 Fax: +44 (0)1494-434888 Mob: +44 (0)7946-710026 www.campbellcarr.co.uk m_sandford@campbellcarr.co.uk