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RE: LeoThread 2024-12-24 09:24

in LeoFinance • 2 days ago

Understanding Linux RAM Usage

Linux is often misconceived as "stealing" RAM, but this is usually due to a misunderstanding of how the operating system utilizes memory for disc caching, making systems faster and more responsive.

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     2 days ago  

    Common Misconceptions

    • 🤔 Many Linux users mistakenly believe that their system is using too much RAM, when in reality, the operating system is simply borrowing unused memory for disc caching.
    • 📊 This disc caching can make it seem like the system is low on free memory, but in actuality, everything is functioning as intended.
    • 🚫 The primary misconception is that disc caching takes memory away from applications, which is not the case.

    How Disc Caching Works

    • 💻 Disc caching involves loading commonly used elements into memory, making subsequent loads considerably faster.
    • 📈 This process is similar to how web browsers cache websites, loading them faster on subsequent visits.
    • 📊 The system can release cached memory back to applications if needed, ensuring that memory is allocated efficiently.
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       2 days ago  

      Checking Available RAM

      • 📊 The free command can be used to check available RAM, but it's essential to understand the difference between "free" and "available" memory.
      • 📈 Available memory includes cached memory that can be freed for applications, providing a more accurate representation of usable RAM.

      When to Worry About RAM Usage

      • 🚨 If free memory is close to zero and available memory is low, or if swap usage is increasing, it may indicate a legitimate memory issue.
      • 📊 However, if available memory is sufficient and swap usage remains steady, the system is likely healthy and utilizing memory efficiently.

      Adjusting Swappiness

      • 📊 Linux's swappiness value controls how aggressively the system moves inactive memory pages to swap, with higher values being more aggressive.
      • 🚫 However, disabling disc caching is generally not recommended, as it can degrade system performance.
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