Oracle Locator performance issue (10046 trace data)

From: Chris Stephens <cstephens16_at_gmail.com>
Date: Thu, 24 Oct 2019 14:01:47 -0500
Message-ID: <CAEFL0sx_Xw2SHTqAC29CvaDcEsYzwzavVqTjSu6k-XmiPkFfXg_at_mail.gmail.com>

We are starting to mess with Oracle Locator some and immediately hit performance issue. Trace data shows a single fetch call accounts for vast majority of response time. I don't know if this is due to lack of instrumentation w/ locator or something else. Does anyone have experience w/ this kind of this that might be able to provide some insight? Oracle 12.2
*** 2019-10-24T12:57:20.329694-05:00
FETCH
#140556737969632:c=70530,e=580279740,p=0,cr=0,cu=0,mis=0,r=20,dep=0,og=1,plh=2353454263,tim=10624057091673
STAT #140556737969632 id=1 cnt=20 pid=0 pos=1 obj=0 op='COUNT STOPKEY (cr=0 pr=0 pw=0 str=1 time=580294149 us)'
STAT #140556737969632 id=2 cnt=20 pid=1 pos=1 obj=0 op='PX COORDINATOR  (cr=0 pr=0 pw=0 str=1 time=580294109 us)' STAT #140556737969632 id=3 cnt=0 pid=2 pos=1 obj=0 op='PX SEND QC (ORDER) :TQ10001 (cr=0 pr=0 pw=0 str=0 time=0 us cost=24196 size=64309407 card=691499)'

STAT #140556737969632 id=4 cnt=0 pid=3 pos=1 obj=0 op='VIEW  (cr=0 pr=0
pw=0 str=0 time=0 us cost=24196 size=64309407 card=691499)'
STAT #140556737969632 id=5 cnt=0 pid=4 pos=1 obj=0 op='SORT ORDER BY

STOPKEY (cr=0 pr=0 pw=0 str=0 time=0 us cost=24196 size=43564437 card=691499)'

STAT #140556737969632 id=6 cnt=0 pid=5 pos=1 obj=0 op='PX RECEIVE  (cr=0
pr=0 pw=0 str=0 time=0 us cost=13731 size=43564437 card=691499)'
STAT #140556737969632 id=7 cnt=0 pid=6 pos=1 obj=0 op='PX SEND RANGE

:TQ10000 (cr=0 pr=0 pw=0 str=0 time=0 us cost=13731 size=43564437 card=691499)'
STAT #140556737969632 id=8 cnt=0 pid=7 pos=1 obj=0 op='PX PARTITION RANGE ALL PARTITION: 1 16 (cr=0 pr=0 pw=0 str=0 time=0 us cost=13731 size=43564437 card=691499)'
STAT #140556737969632 id=9 cnt=0 pid=8 pos=1 obj=0 op='SORT ORDER BY STOPKEY (cr=0 pr=0 pw=0 str=0 time=0 us)' STAT #140556737969632 id=10 cnt=0 pid=9 pos=1 obj=714991 op='TABLE ACCESS BY LOCAL INDEX ROWID Y6A1_LOCATOR PARTITION: 1 16 (cr=0 pr=0 pw=0 str=0 time=0 us cost=13731 size=43564437 card=691499)' STAT #140556737969632 id=11 cnt=0 pid=10 pos=1 obj=715087 op='DOMAIN INDEX (SEL: 0.100000 %) Y6A1_LOCATOR_GEO_BTX (cr=0 pr=0 pw=0 str=0 time=0 us cost=5 size=0 card=0)'
EXEC
#140556737964464:c=87,e=87,p=0,cr=0,cu=0,mis=0,r=1,dep=0,og=1,plh=0,tim=10624057093221
XCTEND rlbk=0, rd_only=1, tim=10624057093262

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Received on Thu Oct 24 2019 - 21:01:47 CEST