Configure Transparent Huge Pages (THP) to madvise to Avoid Increased Memory Usage

DüşükDüzey 1Otomatikcockroachdb

Açıklama

Linux Transparent Huge Pages (THP) is a kernel feature that automatically manages large memory pages to improve performance for some workloads. However, for databases such as CockroachDB, this behavior can cause unpredictable latency spikes, increased memory fragmentation, and excessive CPU overhead due to THP defragmentation. Cockroach Labs recommends configuring THP to madvise instead of the default always mode. The benchmark rates this recommendation Manual; the automated check covers its objective pass criterion. Passes when madvise is the selected (bracketed) Transparent Huge Pages mode.

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

shell

out=$(cat /sys/kernel/mm/transparent_hugepage/enabled 2>/dev/null) || exit 1; printf '%s\n' "$out" | grep -o '\[[a-z]*\]'

Beklenen çıktı: [madvise]

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

echo madvise > /sys/kernel/mm/transparent_hugepage/enabled (and defrag), then persist it at boot (kernel parameter transparent_hugepage=madvise or a systemd unit).

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: cockroachdbos
Referans: CIS CockroachDB v25.x Benchmark v1.0.0 - 2.6 Configure Transparent Huge Pages (THP) to madvise to Avoid Increased Memory Usage

Bu ana makineyi denetle

Bunu denetleme izniniz olan bir makinede çalıştırın. Tarama salt okunurdur.

shell

tmaegis scan --target cockroachdb