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# troubleshootings
Slackbot
03/13/2023, 9:33 AMThis message was deleted.
v
Vijay Narayanan
03/13/2023, 9:46 AMGC of 67s is very large. How many threads in the historical and how much heap to you have?
g
Guapo luis
03/13/2023, 10:59 AM-Xms50g -Xmx50g -XX:+UseG1GC -XX:MaxDirectMemorySize=150g
Guapo luis
03/13/2023, 11:00 AMdruid.server.http.numThreads=60
Guapo luis
03/13/2023, 11:00 AMdruid.processing.numThreads=35
g
Gian Merlino
03/13/2023, 11:07 PMI would suggest focusing on the 67s full gc— that's wild!
Gian Merlino
03/13/2023, 11:07 PMif we can address that, then your other issues will be mitigated
Gian Merlino
03/13/2023, 11:07 PMsome suggestion here about how to figure out what's causing the GCs (heap histogram or alloc profiling): https://apachedruidworkspace.slack.com/archives/C0309C9L90D/p1676370760624409?thread_ts=1676314924.103779&cid=C0309C9L90D