Hello, from what I could observe, once they reach this level (after a day) it stays high and blocks any transfers. - Since we have it on production machines and do not have better alternative, I put a crontab restart every two hours. After restart, btsync is temporarily busy as it loads all folders anew, but after few minutes, web gui starts working and the load drops to some 18-30%. Peaks occur occasionally, probably during reindexing, but stay temporary. - some 400K+ files, almost 200GB volume, total tree structure has some 18K+ folders. There are about 50 synchronized folders (btsync entries) ranging from few MB up to 34 GB total volume. (We are in a planning phase to put most of it out of sync to a permanent archive, but this is our current load) - CPU on QNAP is dual core Pentium (1.9 GHz IIRC), CentOS machine is a different flavor but also a dual core Pentium. I will have a look for the logs. I will switch off the restarts on weekend and try to collect more information. What we have now would probably not be representative because I installed a regular 2-hour restart in all units. In the meantime we switched off CentOS (it was receiving uploaded files from web server but we redirected the upload directly to the QNAP NAS) so I am afraid it will not provide any more data. Regards, Jindra