WiredTiger | BestHub

Aikesheng Open Source Community

Jun 14, 2023 · Databases

MongoDB Crash Analysis: WT_SESSION Exhaustion Caused by Index Drop During Background Index Build

An original case study examines a MongoDB 4.0.14 replica set crash triggered by exceeding the WiredTiger session limit when a primary creates a background index and subsequently drops it, causing blocking on the secondary, leading to connection saturation, session exhaustion, and instance failure.

Database OperationsIndexingMongoDB

0 likes · 10 min read

MongoDB Crash Analysis: WT_SESSION Exhaustion Caused by Index Drop During Background Index Build

Tencent Cloud Developer

Aug 2, 2021 · Databases

Improving MongoDB Million-Collection Performance with Shared WiredTiger Table Space

Tencent’s MongoDB team solved the severe performance degradation caused by millions of collections by redesigning WiredTiger to use a shared table‑space with prefix‑mapped keys, eliminating data‑handle explosion, cutting memory use and lock contention, reducing startup from hours to minutes, and boosting read/write throughput by up to two orders of magnitude while preserving full MongoDB compatibility.

MongoDBShared Table SpaceWiredTiger

0 likes · 20 min read

Improving MongoDB Million-Collection Performance with Shared WiredTiger Table Space

Tencent Database Technology

Jul 29, 2021 · Databases

Performance Optimization of MongoDB for Million‑Scale Collections Using Shared Table Space Architecture

The Tencent CMongo team analyzed severe memory consumption, slow queries, and hour‑long startup caused by millions of MongoDB collections, identified bottlenecks in WiredTiger’s data‑handle management and schema‑lock handling, and introduced a shared‑table‑space architecture that reduces WT tables to a handful, achieving 1‑2 order‑of‑magnitude speedups and eliminating OOM failures.

MongoDBOptimizationPerformance

0 likes · 19 min read

Performance Optimization of MongoDB for Million‑Scale Collections Using Shared Table Space Architecture

Architecture Digest

Dec 15, 2019 · Databases

MongoDB High‑Throughput Cluster Optimization: Software, Configuration, and Storage Engine Tuning

This article details how a high‑traffic MongoDB sharded cluster exceeding one million TPS was optimized through software‑level tweaks, configuration changes, WiredTiger storage‑engine tuning, and hardware upgrades, resulting in latency reductions from hundreds of milliseconds to a few milliseconds and significantly improved stability.

Database TuningMongoDBSharding

0 likes · 33 min read

MongoDB High‑Throughput Cluster Optimization: Software, Configuration, and Storage Engine Tuning

High Availability Architecture

Sep 14, 2016 · Databases

Analysis of WiredTiger Eviction Cache and Write Hang Issues in MongoDB

This article examines why MongoDB's WiredTiger storage engine experiences intermittent write hangs, detailing the eviction cache design, hazard pointer concurrency, eviction thread model, checkpoint interactions, performance bottlenecks, and practical mitigation strategies.

MongoDBPerformanceWiredTiger

0 likes · 20 min read

Analysis of WiredTiger Eviction Cache and Write Hang Issues in MongoDB

High Availability Architecture

Jun 29, 2016 · Databases

In‑Depth Analysis of WiredTiger Storage Engine Architecture and Performance

This article examines WiredTiger’s novel data‑organization design, its in‑memory page and disk‑extent structures, skiplist‑based insert handling, MVCC update lists, compression mechanisms, and performance test results, providing practical configuration advice for MongoDB deployments.

MVCCMongoDBPerformance

0 likes · 26 min read

In‑Depth Analysis of WiredTiger Storage Engine Architecture and Performance

High Availability Architecture

Jan 20, 2016 · Databases

MongoDB Storage Engine Evolution, Replication Enhancements, and New Features

The article reviews MongoDB's storage engine developments—including MMAP, WiredTiger, RocksDB, and Memory engines—highlights replication protocol improvements, automatic sharding changes, and introduces new features such as batch and partial indexes, document validation, and join capabilities, while providing performance test results and a Q&A section.

IndexingMongoDBPerformance

0 likes · 14 min read

MongoDB Storage Engine Evolution, Replication Enhancements, and New Features

Efficient Ops

Nov 25, 2015 · Databases

MongoDB 3.x Performance Secrets: Benchmarks, Issues, and Best Practices

This article presents comprehensive MongoDB performance benchmarks, discusses version-specific issues, and offers practical best‑practice recommendations for schema design, driver usage, replication, and monitoring to help engineers optimize their deployments.

BenchmarkBest PracticesMongoDB

0 likes · 11 min read

MongoDB 3.x Performance Secrets: Benchmarks, Issues, and Best Practices