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System shows stable work without unexpected errors and spikes, however there is slowness on DB side. According to PG Hero there is 8 slow queries (See "Slow queries" selection) that causing high CPU usage and slowness. 

Version

okapi:4.2.2

mod-inventory-storage:19.4.3"

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DB load by waits:

DB load by SQL

RDS memory usage:

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Slow queries:

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RDS memory usage

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