Method readMemory

src/monitoring.ts:261–287

()

  }

  protected async readMemory(): Promise<number | null> {
    let usageContent: string;
    let limitContent: string;
    try {
      [usageContent, limitContent] = await Promise.all([
        readWithTimeout(
          '/sys/fs/cgroup/memory/memory.usage_in_bytes',
          this.readFile,
        ),
        readWithTimeout(
          '/sys/fs/cgroup/memory/memory.limit_in_bytes',
          this.readFile,
        ),
      ]);
    } catch (err) {
      this.logOnce('memory-read', err);
      return null;
    }

    const usage = Number(usageContent.trim());
    const limit = parseMemoryV1Limit(limitContent);
    if (!Number.isFinite(usage) || limit === null || limit <= 0) {
      this.logOnce('memory-parse', new Error('cgroup v1 memory parse failed'));
      return null;
    }
    return usage / limit;
  }

  protected logOnce(category: string, err: unknown) {
    if (this.loggedFailure.has(category)) return;