Understand a quey : update seg$ set type#=:4,blocks=:5,extents

Hello

In Our Production database, we have a query executed by oracle user, with  elapsed time 3260h49min37s (value of LAST_CALL_ET) , it's still running !

update seg$ set type#=:4,blocks=:5,extents=:6,minexts=:7,maxexts=:8,extsize=:9,extpct=:10,user#=:11,iniexts=:12,lists=decode(:13, 65535, NULL, :13),groups=decode(:14, 65535, NULL, :14), cachehint=:15, hwmincr=:16, spare1=DECODE(:17,0,NULL,:17),scanhint=:18, bitmapranges=:19 where ts#=:1 and file#=:2 and block#=:3

I need to understand this query, why it’s executed. The 3260h is really elapsed time!! Do we need to optimize it?

 

I use this query to find  it :

    

   SELECT   Elapsed_Time,   a.OSUSER, b.sql_text

   FROM gv$session a, gv$sqlarea b