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

NiskaNivo 1Automatskacockroachdb

Opis

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.

Kako se proverava

Metod provere: Komanda ljuske

shell

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

Očekivani izlaz: [madvise]

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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

Svojstva

Operativni sistemi: Bilo koji
Oznake: cockroachdbos
Referenca: CIS CockroachDB v25.x Benchmark v1.0.0 - 2.6 Configure Transparent Huge Pages (THP) to madvise to Avoid Increased Memory Usage

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target cockroachdb