Ladsgroup created this task.
Ladsgroup added projects: Wikidata, Wikidata-Campsite 
(Wikidata-Campsite-Iteration-∞), User-Ladsgroup, User-Addshore.

TASK DESCRIPTION
  After increasing the range of read new from up to Q2M to Q4M, this happened 
<https://grafana.wikimedia.org/d/000000278/mysql-aggregated?orgId=1&var-dc=eqiad%20prometheus%2Fops&var-group=core&var-shard=s8&var-role=All&from=1582647127887&to=1582656141190>
 (until revert):
  F31630858: image.png <https://phabricator.wikimedia.org/F31630858>
  
  This led to increase on average response time from app servers 
<https://grafana.wikimedia.org/d/RIA1lzDZk/application-servers-red-dashboard?panelId=9&fullscreen&orgId=1&from=1582644741972&to=1582658078248&var-datasource=eqiad%20prometheus%2Fops&var-cluster=appserver&var-method=GET>:
  F31630860: image.png <https://phabricator.wikimedia.org/F31630860>
  
  Looking at tendril, it seems the reason is that there's no limit on number of 
entities that are given to the new term store (in this case 2511 entities at 
once):
  P10524 (An Untitled Masterwork) <https://phabricator.wikimedia.org/P10524>

TASK DETAIL
  https://phabricator.wikimedia.org/T246159

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Ladsgroup
Cc: Aklapper, ArielGlenn, Addshore, WMDE-leszek, Ladsgroup, Hazizibinmahdi, 
Iflorez, darthmon_wmde, alaa_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, 
QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Wikidata-bugs, 
aude, Lydia_Pintscher, Mbch331
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