Hi Andy, unfortunately it was not a solution, as I was trying to say: currently we don't observe thread saturation in those servers where async I/O is on and we don't observe it in those servers where async I/O is off. So we cannot conclude anything. We do not use Lustre, we use GPFS. Cheers, lucia -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1799#issuecomment-1334033898 You are receiving this because you commented. Message ID: <[log in to unmask]> ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1