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Type: Bug
Resolution: Duplicate
Priority: Major - P3
Fix Version/s: None
Affects Version/s: 3.6.6
Component/s: Storage
Labels:
- dmd-perf

Assigned Teams:

Storage Execution
Operating System:
ALL
Sprint:
Storage NYC 2018-07-30, Storage NYC 2018-08-13, Storage NYC 2018-08-27, Storage NYC 2018-09-10, Storage NYC 2018-10-22, Storage NYC 2018-11-05
Linked BF Score:
0
Confidence Status:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name:
None
Goal Link:
None

The update portion of the repro script repro-10MBx2.sh from ~~SERVER-33191~~ shows ~10x regression between 3.6.5 (left) and 3.6.6 (right).

This seems to be related to eviction of large pages. Interestingly even though we are doing only about 9 updates per second, we are doing 170 evictions per second.

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erratic-1.png
48 kB
Jul 25 2018 04:08:41 PM UTC
erratic-1.tar
185 kB
Jul 25 2018 04:09:04 PM UTC
evictions.png
107 kB
Dec 04 2018 12:39:23 PM UTC
four.png
47 kB
Sep 20 2018 03:48:55 PM UTC
four-erratic.png
50 kB
Sep 20 2018 03:49:04 PM UTC
regression.png
106 kB
Jul 20 2018 07:00:13 PM UTC
repro-10MBx2-erratic-1.sh
1 kB
Jul 25 2018 04:09:16 PM UTC
repro-10MBx2-regression.sh
1 kB
Jul 25 2018 04:09:16 PM UTC
stacks-regression.txt
1.88 MB
Jul 25 2018 04:09:05 PM UTC

depends on

WT-4483 Improve caching of small updates to large values

Closed

duplicates

WT-4483 Improve caching of small updates to large values

Closed

is related to

SERVER-31679 Increase in disk i/o for writes to replica set

Closed

SERVER-33191 Cache-full hangs on 3.6

Closed

SERVER-36373 create test to fill WT cache during steady state replication

Closed

WT-4105 Optimize cache usage for update workload with history pinned

Closed

related to

SERVER-35958 Big CPU load increase (×4) on secondary by upgrading 3.4.15 → 3.6.5

Closed

(1 is related to, 1 related to)

Assignee:: [DO NOT USE] Backlog - Storage Execution Team

Reporter:: Bruce Lucas (Inactive)

Participants:: [DO NOT USE] Backlog - Storage Execution Team, Alexander Gorrod, Benety Goh, Bruce Lucas, Kelsey Schubert, Michael Cahill

Votes:: 0 Vote for this issue

Watchers:: 21 Start watching this issue

Created:: Jul 20 2018 07:00:15 PM UTC

Updated:: Dec 06 2022 03:23:32 AM UTC

Resolved:: Feb 28 2019 05:55:29 PM UTC

Confidence Status Last Update:: 25/Sep/18 5:21 PM

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