Re: [gpfsug-discuss] mmfsd recording High CPU usage

2018-11-21 Thread Sven Oehme
Hi, the best way to debug something like that is to start with top. start top then press 1 and check if any of the cores has almost 0% idle while others have plenty of CPU left. if that is the case you have one very hot thread. to further isolate it you can press 1 again to collapse the cores,

Re: [gpfsug-discuss] mmfsd recording High CPU usage

2018-11-21 Thread Jim Doherty
At a guess with no data    if the application is opening more files than can fit in the maxFilesToCache (MFTC) objects  GPFS will expand the MFTC to support the open files,  but it will also scan to try and free any unused objects.    If you can identify the user job that is causing this 

[gpfsug-discuss] mmfsd recording High CPU usage

2018-11-20 Thread Saula, Oluwasijibomi
Hello Scalers, First, let me say Happy Thanksgiving to those of us in the US and to those beyond, well, it's a still happy day seeing we're still above ground!  Now, what I have to discuss isn't anything extreme so don't skip the turkey for this, but lately, on a few of our compute GPFS