system slowdown

user      rss(KiB)  vmem(KiB)
zhaoze
dvenkat   366016    30343248
mattmill  3532576   34949556
jalal     4098812   48343360
yizheng   292748    5419108
cxue2     5504348   56420648
diala     18052     722376

***************************
$ free -h
              total        used        free      shared  buff/cache   available
Mem:           125G         15G         11G         47M         98G        108G
Swap:          9.3G        2.1G        7.2G

***************************

$ df -H
Filesystem      Size  Used Avail Use% Mounted on
udev             68G     0   68G   0% /dev
tmpfs            14G  4.2M   14G   1% /run
/dev/sdb3       975G  527G  399G  57% /
tmpfs            68G  113M   68G   1% /dev/shm
tmpfs           5.3M  4.1k  5.3M   1% /run/lock
tmpfs            68G     0   68G   0% /sys/fs/cgroup
/dev/loop4      787k  787k     0 100% /snap/gnome-characters/761
/dev/loop0       69M   69M     0 100% /snap/gtk-common-themes/1514
/dev/loop3       69M   69M     0 100% /snap/gtk-common-themes/1519
/dev/loop2      105M  105M     0 100% /snap/core/11993
/dev/loop5      6.6M  6.6M     0 100% /snap/curl/412
/dev/loop1      311M  311M     0 100% /snap/vlc/2344
/dev/loop7      148M  148M     0 100% /snap/gnome-3-26-1604/104
/dev/loop6      787k  787k     0 100% /snap/gnome-characters/726
/dev/loop10     656k  656k     0 100% /snap/gnome-logs/103
/dev/loop9      105M  105M     0 100% /snap/core/11798
/dev/loop15     1.1M  1.1M     0 100% /snap/natls/109
/dev/loop14     2.8M  2.8M     0 100% /snap/gnome-system-monitor/169
/dev/loop16     448M  448M     0 100% /snap/pycharm-community/252
/dev/loop17     132k  132k     0 100% /snap/bare/5
/dev/loop18     656k  656k     0 100% /snap/gnome-logs/106
/dev/loop19     2.7M  2.7M     0 100% /snap/gnome-calculator/884
/dev/loop20     448M  448M     0 100% /snap/pycharm-community/256
/dev/loop21     230M  230M     0 100% /snap/gnome-3-34-1804/72
/dev/loop22      59M   59M     0 100% /snap/core18/2246
/dev/loop23     148M  148M     0 100% /snap/gnome-3-26-1604/102
/dev/loop24     255M  255M     0 100% /snap/gnome-3-38-2004/76
/dev/loop25      65M   65M     0 100% /snap/core20/1169
/dev/nvme0n1    2.0T  1.7T  243G  88% /data_2
/dev/sdd        3.0T  2.6T  216G  93% /data_1
/dev/sdb1       475M  120M  327M  27% /boot
/dev/sdc1       4.0T  3.1T  667G  83% /data
/dev/sda2        17T   11T  5.2T  68% /SeaExp
tmpfs            14G     0   14G   0% /run/user/1019
tmpfs            14G   17k   14G   1% /run/user/1036
tmpfs            14G   74k   14G   1% /run/user/1054
tmpfs            14G   29k   14G   1% /run/user/1046
tmpfs            14G     0   14G   0% /run/user/1014
tmpfs            14G   17k   14G   1% /run/user/128
/dev/loop26     6.6M  6.6M     0 100% /snap/curl/484
tmpfs            14G   62k   14G   1% /run/user/1002
/dev/loop27     2.8M  2.8M     0 100% /snap/gnome-system-monitor/174
/dev/loop13      65M   65M     0 100% /snap/core20/1242
/dev/sde2        16T   15T  448G  98% /SeaExp_1
tmpfs            14G     0   14G   0% /run/user/1051
/dev/loop12      59M   59M     0 100% /snap/core18/2253
tmpfs            14G     0   14G   0% /run/user/1055
/dev/loop8      230M  230M     0 100% /snap/gnome-3-34-1804/77
/dev/loop11     261M  261M     0 100% /snap/gnome-3-38-2004/87
tmpfs            14G     0   14G   0% /run/user/1003