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Deepin Linux

Dec 19, 2024 · Fundamentals

Understanding the Implementation and Mechanisms of the C malloc Function

This article explains the purpose, prototype, and usage of C's malloc function, delves into its underlying implementation using free‑list mechanisms, virtual‑memory translation, system calls like brk and mmap, and compares it with related functions such as calloc, realloc and new, while providing practical code examples and best‑practice guidelines.

C++Memory Allocationdynamic memory

0 likes · 32 min read

Understanding the Implementation and Mechanisms of the C malloc Function

vivo Internet Technology

Dec 11, 2024 · Databases

RocksDB Memory Usage Analysis and Optimization: Troubleshooting Excessive Memory Consumption in Production

The article examines a production RocksDB memory‑usage problem where two instances consumed 59 GB on a 32‑CPU, 64‑GB server, identifies glibc ptmalloc’s unreclaimed free memory as the main cause, and shows that switching to jemalloc cuts usage by roughly 25 % while improving I/O and CPU efficiency.

Database PerformanceLinux Memory ManagementMemory Optimization

0 likes · 11 min read

RocksDB Memory Usage Analysis and Optimization: Troubleshooting Excessive Memory Consumption in Production

vivo Internet Technology

Nov 6, 2024 · Fundamentals

Analysis of glibc Memory Management and Solutions to an Online Memory Incident

The article examines a real‑world memory alarm in a Vivo service, explains how glibc’s ptmalloc allocator manages heap memory via brk, sbrk, and mmap, shows why freed chunks stay in bins, and recommends limiting heap growth or switching to jemalloc for faster reclamation.

Backend DevelopmentC runtimeMemory Management

0 likes · 20 min read

Analysis of glibc Memory Management and Solutions to an Online Memory Incident

Refining Core Development Skills

Jan 23, 2024 · Fundamentals

Deep Dive into the Internal Working of malloc and the ptmalloc Memory Allocator

This article explains how the glibc malloc implementation (ptmalloc) manages memory by using arenas, chunks, and various bin structures such as fastbins, smallbins, largebins, and unsorted bins, and describes the step‑by‑step allocation process performed by public_mALLOc and its helper functions.

C++HeapMemory Allocation

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Deep Dive into the Internal Working of malloc and the ptmalloc Memory Allocator

Zhuanzhuan Tech

Sep 14, 2023 · Fundamentals

Analysis and Comparison of ptmalloc and tcmalloc Memory Allocators on Linux

This article examines Linux memory management fundamentals, explains the brk/sbrk and mmap system calls, details the internal architectures, allocation and reclamation processes of ptmalloc and tcmalloc, analyzes key configuration parameters, and presents benchmark and production‑level results that demonstrate their impact on performance and memory usage.

BenchmarkMemory AllocationPerformance

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Analysis and Comparison of ptmalloc and tcmalloc Memory Allocators on Linux

Qunar Tech Salon

Jan 31, 2023 · Operations

Root Cause Analysis and Mitigation of JVM GC‑Induced OOM and Memory Fragmentation in a Containerized Hotel Pricing Service

This article details how long JVM garbage‑collection pauses and glibc ptmalloc memory‑fragmentation caused container OOM kills in a hotel‑pricing system, and explains the step‑by‑step diagnosis, JVM tuning, Kubernetes health‑check adjustments, and the replacement of ptmalloc with jemalloc to eliminate the issue.

GCJVMKubernetes

0 likes · 9 min read

Root Cause Analysis and Mitigation of JVM GC‑Induced OOM and Memory Fragmentation in a Containerized Hotel Pricing Service

Baidu Geek Talk

Dec 16, 2022 · Fundamentals

Exploring ptmalloc: Memory Management in Linux C++ Programs

The article explains how glibc’s default ptmalloc allocator structures memory into main and non‑main arenas, uses chunk‑based bins (fast, unsorted, small, large) for allocation and deallocation, details its locking and OS‑interaction mechanisms, and evaluates its design trade‑offs versus modern allocators.

C++Memory Managementfree

0 likes · 12 min read

Exploring ptmalloc: Memory Management in Linux C++ Programs

58 Tech

Dec 6, 2019 · Fundamentals

Analyzing Heap Memory Usage and Detecting Memory Leaks in C++ Processes with Core Analyzer

This article introduces common memory‑leak detection tools, explains how to analyze heap memory consumption of a C++ process using AddressSanitizer, Valgrind and the core_analyzer utility, and provides practical optimization suggestions for reducing memory bloat and fragmentation.

C++Memory LeakPerformance Debugging

0 likes · 18 min read

Analyzing Heap Memory Usage and Detecting Memory Leaks in C++ Processes with Core Analyzer