Hello Sorry, I gave up digging in the mailing list because didn't found search functionality there ( https://www.monetdb.org/pipermail/users-list/ ) Then I wonder why I get that result when running "top" command on my server:

PID UTIL. PR NI VIRT RES SHR S %CPU %MEM TEMPS+ COM.

3297 monetdb 20 0 53,007g 9,028g 8,396g S 100,5 28,8 117:20.95 mserver5

There is no query running AFAIK (select * from sys.queue is empty). I loaded my database several hours before from scratch, and then ran some sql. How can I figure out what appends in the background ? Is it indexing based on queries I made ? Apparently the disk is stable, by mean there is no creation of new indexes, or files under the hood. Any insight welcome, Thanks,