how each session is interacting with the database

select sid, (isreads+bufreads+bufwrites+pagreads+pagwrites) access, locksheld,  
seqscans, total_sorts, dsksorts 
from syssesprof 

 Sid    access       locksheld     seqscans   tot_sorts disksorts
233982      246              0          2            0           0
230421     7789             12        456         1000           0
225679     9981            213        669          876           2
247869    10098            440        578           98           2
   78       70             45          6            0           0
  447       46             89          6            0           0