This message was deleted.
# troubleshootings
Slackbot
02/02/2023, 10:56 AMThis message was deleted.
v
Vijay Narayanan
02/02/2023, 11:29 AMthere is no limitation but lookups are stored on heap and you need to keep that in mind
d
D K
02/02/2023, 11:38 AMHi @Vijay Narayanan if i make the config (druid.lookup.namespace.cache.type) as offheap as per this document, will it still store on heap? https://druid.apache.org/docs/latest/development/extensions-core/lookups-cached-global.html#cache-settings
v
Vijay Narayanan
02/02/2023, 12:22 PMin that case they will be stored off heap but the lookups will still take up memory in the page cache (so ultimately the available RAM will be a hard limit).
d
D K
02/02/2023, 1:26 PMgot it thanks
D K
02/02/2023, 1:27 PMOne other question related to druid.processing.buffer.sizeBytes. currently we have this configured as 1Gb. Will there be a query performance improvement if we keep the value higher at say 3 GB?
v
Vijay Narayanan
02/02/2023, 2:00 PMmax buffer size is 2GB. Setting buffer to max 2GB could help but there is a trade off as it will reduce available memory for memory mapping segments and hence segments will be paged from disk
👍 1
2 Views