What is "Select @OlapEvent ..."

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hi,

I ran a SQL Profiler on my database engine and saw a bunch of entries
like following:

"DECLARE @OlapEvent BIGINT;SELECT @OlapEvent = ObjIdUpdate(2);SELECT
(@OlapEvent & convert(bigint, 0xffff000000000000)) /
0x0001000000000000 AS Status, (@OlapEvent & convert(bigint,
0x0000ffff00000000)) / 0x0000000100000000 AS DbId, @OlapEvent &
convert(bigint, 0xffffffff) AS ObjId;"

Anybody know what these events are?

More importantly, these events normally has a ver long
"duration" (around 1-2 seconds) while their "CPU"/"READ"/"WRITE" are
0. How should I interpret these numbers? should I worry about the long
duration, or should I ignore them since they don't cost any CPU/IO and
probably are just stuck in the queue?

Thanks in advance

.

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