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manual:installation:upgrade_notes_540
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10 Upgrade notes for 5.4.0
Zabbix 5.4.0 is not released yet.
Critical
Informational
Direct connections to database removed from pollers
Calculated, aggregated and internal checks are now performed by the new history poller process. The StartHistoryPollers value should be increased if history pollers are too busy, but should be kept low if possible to avoid unnecessary connections to database.
Naming in JavaScript objects
Naming in additional JavaScript objects has been changed.