Hi, 

We have multiple Drupal sites and for each site we have created separate 
collection in Solr 7.7.3 cluster with 5 node. each instance has 16GBs of memory 
and 8 GBs of JVM. 

Whenever from any drupal site we delete some document we send deleteByQuery  
request (Module dependency) heap usage spikes up and take down few nodes. 
Is there any way to prevent heap usage spike by deleteByQuery. 

Thanks, 
Pankaj khandelwal 

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