Thanks for answer. I ran "trace select count(*) from view" and it returned "user | statement" that I really could not understand. In documentation I saw it should return :
create function sys.tracelog()
returns table (
event integer, -- event counter
clk varchar(20), -- wallclock, no mtime in kernel
pc varchar(50), -- module.function[nr]
thread int, -- thread identifier
ticks bigint, -- time in microseconds
rrsMB bigint, -- resident memory in MB
vmMB bigint, -- virtual size in MB
reads bigint, -- number of blocks read
writes bigint, -- number of blocks written
minflt bigint, -- minor page faults
majflt bigint, -- major page faults
nvcsw bigint, -- non-volantary conext switch
stmt string -- actual statement executed
)