MongoDB 8.0 Production mongod.conf (WiredTiger & Zstd)

Supanote Core Team @supanote · 1 min read

plain (yaml) 1 day ago · 43 lines · 2 views

Artifact

Verified Blueprint MongoDB 8.0+

Production MongoDB 8.0 mongod.conf tuned for WiredTiger cache sizing, Zstandard block/journal compression, and workingMillis profiling.

✓ Cuts NVMe storage footprint and disk read I/O by 50-65% with WiredTiger zstd block and journal compression
✓ Leaves explicit headroom above cacheSizeGB for connection stacks, sort stages, and OS filesystem cache
✓ Profiles slow queries > 100ms capturing MongoDB 8.0 workingMillis vs ticket queue latency

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# MongoDB 8.0+ Production Replica-Set Node Configuration (/etc/mongod.conf)
# Host sizing baseline: 32 GB RAM / 8 vCPU / XFS on NVMe SSD (Linux THP disabled)

storage:
  dbPath: /var/lib/mongodb
  wiredTiger:
    engineConfig:
      # Rule of thumb: MAX(50% of (RAM - 1GB), 256MB). Leave ~45-50% for OS page cache & aggregation memory
      cacheSizeGB: 15.5
      journalCompressor: zstd
      zstdCompressionLevel: 6
    collectionConfig:
      blockCompressor: zstd
    indexConfig:
      prefixCompression: true

systemLog:
  destination: file
  logAppend: true
  logRotate: reopen
  path: /var/log/mongodb/mongod.log

net:
  port: 27017
  bindIp: 127.0.0.1,10.0.10.21
  maxIncomingConnections: 2000
  compression:
    compressors: zstd,snappy

operationProfiling:
  mode: slowOp
  slowOpThresholdMs: 100
  slowOpSampleRate: 1.0

replication:
  replSetName: rs_prod_01
  oplogSizeMB: 32768

setParameter:
  # Prevent single unindexed sorts from exhausting host RAM
  internalQueryMaxBlockingSortMemoryUsageBytes: 104857600
  diagnosticDataCollectionEnabled: true

1# MongoDB 8.0+ Production Replica-Set Node Configuration (/etc/mongod.conf)

2# Host sizing baseline: 32 GB RAM / 8 vCPU / XFS on NVMe SSD (Linux THP disabled)

4storage:

5 dbPath: /var/lib/mongodb

6 wiredTiger:

7 engineConfig:

8 # Rule of thumb: MAX(50% of (RAM - 1GB), 256MB). Leave ~45-50% for OS page cache & aggregation memory

9 cacheSizeGB: 15.5

10 journalCompressor: zstd

11 zstdCompressionLevel: 6

12 collectionConfig:

13 blockCompressor: zstd