1. We have had a problem with ARXRWMAI for quite some time..... Finally today we managed to get a proper trace-file, which have been uploaded to Oracle Support, and it appears(we still need Oracle Support to confirm this) the culprit is enqueues, which is a Unix resource... weird that this problem only appears on HP-UX and not on Solaris..... running tkprof on the trace-file as: tkprof oa_prod_ora_7537_JAHI oa_prod_ora_7537_JAHI explain=apps/xxx sort=exeela,prsela,fchela showed the problem, see SR: https://metalink.oracle.com/metalink/plsql/f?p=200:37:4645549304284338632::::p_tar_num,p_ctryCode:5343244.993,