CockroachDB
TMA-COCKROACHDB-2.6
Configure Transparent Huge Pages (THP) to madvise to Avoid Increased Memory Usage
Descrição
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.
Como é verificado
Método de auditoria: Comando shell
out=$(cat /sys/kernel/mm/transparent_hugepage/enabled 2>/dev/null) || exit 1; printf '%s\n' "$out" | grep -o '\[[a-z]*\]'- Saída esperada
[madvise]
Como é corrigido
Método de correção: Orientação ou patch de infraestrutura
echo madvise > /sys/kernel/mm/transparent_hugepage/enabled (and defrag), then persist it at boot (kernel parameter transparent_hugepage=madvise or a systemd unit).
Propriedades
- Sistemas operacionais
- Qualquer
- Tags
- cockroachdbos
- Referência
- CIS CockroachDB v25.x Benchmark v1.0.0 - 2.6 Configure Transparent Huge Pages (THP) to madvise to Avoid Increased Memory Usage
Verificar este host
Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.
tmaegis scan --target cockroachdb