Basic Administration Manual: Blocking, Performance, and Basic Configuration in MongoDB
Ready-to-run scripts to review blocked operations, queries without an index, and validate the WiredTiger cache.
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Summary
Problem it solves
Have a set of proven scripts on hand for the daily check of blocking, performance, and configuration in MongoDB, without having to rebuild them every time.
Who it is for
DBAs or system administrators who operate MongoDB in production (standalone or replica set) and need a repeatable technical checklist.
Who it is not for
Anyone who needs sharding design or troubleshooting — this manual covers replica set operation, not a sharded cluster.
What's included
- Reviewing blocking: db.currentOp() and operations waiting on a lock
- Global lock statistics (globalLock)
- Safely terminating an operation (db.killOp)
- Reviewing performance: db.serverStatus()
- Explain on critical queries and detecting COLLSCAN
- Slow query profiler
- Existing indexes and their actual usage ($indexStats)
- Basic configuration: WiredTiger cache
- Journaling and durability
- Basic replica set configuration checklist
- Consolidated daily health-check script
Technical information
Included files
- PDF manual with the diagnostic scripts included in the text
Lab evidence
Lab evidence: in preparation
This guide has no public evidence yet. Once published, it will include anonymized screenshots of the real execution, with no hostnames, private IPs, usernames or client data.
Licenses
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Version history
- 1.0 — 2026-07-28: First published edition.
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