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NoSQL Databases

MongoDB Change Streams in Production: Resume Tokens and the Oplog Window

Run MongoDB change streams in production: store resume tokens durably, size the oplog window, recover from ChangeStreamHistoryLost, and choose updateLookup or pre-images.

MongoDB19 minOct 25, 2026
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Database Performance

MongoDB WiredTiger Cache Tuning: Eviction, Dirty Data, and Memory Limits

Size the MongoDB WiredTiger cache for VMs and containers, read the eviction thresholds in serverStatus, and decide when to resize the cache and when to fix queries and indexes.

MongoDB19 minOct 24, 2026
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NoSQL Databases

MongoDB 9.0: What Changed and How to Upgrade from 8.0

Plan a MongoDB 8.0 to 9.0 upgrade: the behavior changes to test, driver minimums, the rolling order for replica sets and sharded clusters, and how far FCV lets you roll back.

MongoDB18 minOct 15, 2026
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