Avg global enqueue get time (ms)

Question

I noticed Avg global enqueue get time (ms) is 214.5. This is as high as I have seen this and what does it mean? The following flush times are also really high:
Avg global cache cr block flush time (ms): 15.7
Avg global cache current block flush time (ms): 12.9
Avg message sent queue time is showing 942.0 ms
Here are top events: Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
cursor: pin S wait on X 414 16,367 39535 88.4 Concurrenc
kksfbc child completion 44 1,799 40887 9.7 Other
DB CPU 240 1.3
IPC send completion sync 77,702 25 0 .1 Other
external table write 2,434,678 20 0 .1 User I/O
The users are stating that everything is now running many times slower than what we saw in the lab. I verified the interconnect is going across the private interfaces (not public). What else should I be looking at?
Thanks in advance!!

Answer 1

Hi Mike,
I got something for you. Please check this.
-- GLOBAL CACHE LOCK PERFORMANCE
-- This shows the average global enqueue get time.
-- Typically AVG GLOBAL LOCK GET TIME should be 20-30 milliseconds. the elapsed
-- time for a get includes the allocation and initialization of a new global
-- enqueue. If the average global enqueue get (global cache get time) or average
-- global enqueue conversion times are excessive, then your system may be
-- experiencing timeouts. See the 'WAITING SESSIONS', 'GES LOCK BLOCKERS',
-- 'GES LOCK WAITERS', and 'TOP 10 WAIT EVENTS ON SYSTEM' sections if the
-- AVG GLOBAL LOCK GET TIME is high.
set numwidth 20
column "AVG GLOBAL LOCK GET TIME (ms)" format 9999999.9
select b1.inst_id, (b1.value + b2.value) "GLOBAL LOCK GETS",
b3.value "GLOBAL LOCK GET TIME",
(b3.value / (b1.value + b2.value) * 10) "AVG GLOBAL LOCK GET TIME (ms)"
from gv$sysstat b1, gv$sysstat b2, gv$sysstat b3
where b1.name = 'global lock sync gets' and
b2.name = 'global lock async gets' and b3.name = 'global lock get time'
and b1.inst_id = b2.inst_id and b2.inst_id = b3.inst_id
or b1.name = 'global enqueue gets sync' and
b2.name = 'global enqueue gets async' and b3.name = 'global enqueue get time'
and b1.inst_id = b2.inst_id and b2.inst_id = b3.inst_id;
Thanks,
Keyur