小编Kra*_*312的帖子

请考虑机器接收需要大约6ms处理的高频数据,并根据当前在这些参数上运行的系统给出下面的GC日志,建议您使用哪种内存调整建议.

提前致谢.

java -Xms4144m -Xmx4144m -XX:+UseParNewGC -XX:+CMSClassUnloadingEnabled -XX:CMSFullGCsBeforeCompaction=1 -XX:+PrintGCDetails -Xloggc:gc.log -verbose:gc -XX:SurvivorRatio=4 -XX:+UseCompressedOop

GC日志

198.341: [GC 198.341: [ParNew: 1178752K->235712K(1178752K), 0.7930435 secs] 2653227K->1913561K(4007744K), 0.7931001 secs] [Times: user=1.36 sys=0.03, real=0.79 secs] 
219.946: [GC 219.946: [ParNew: 1178752K->235712K(1178752K), 0.6662757 secs] 2856601K->2095809K(4007744K), 0.6663335 secs] [Times: user=1.23 sys=0.03, real=0.67 secs] 
230.170: [GC 230.170: [ParNew: 1178752K->235712K(1178752K), 0.7158400 secs] 3038849K->2235472K(4007744K), 0.7158940 secs] [Times: user=1.39 sys=0.02, real=0.72 secs] 
242.243: [GC 242.243: [ParNew: 1178752K->235712K(1178752K), 0.8650113 secs] 3178512K->2538982K(4007744K), 0.8650603 secs] [Times: user=1.64 sys=0.06, real=0.87 secs] 
257.200: [GC 257.200: [ParNew: 1178752K->235712K(1178752K), 0.6999034 …

我正在循环中处理一个列表,该循环运行async返回一个promise我不想退出处理异常,所以我聚合它们并将它们传递给外部finally块中的resolve回调.我想知道这是否是反模式,如果是,请提供一个如何正确执行的指针.谢谢.

例

async doSomething(list) {
let errorCount = 0
let errors = []
return new Promise(async (resolve, reject) => {
  try {
    list.forEach(async (item) => {
      try {
        actionThatThrows(item)
      } catch (e) {
        errorCount++
        errors[errorCount] = e
      }
    })
  } catch (e) {
    errorCount++
    errors[errorCount] = e
  } finally {
    if (errorCount > 0) {
      resolve(errors)
    } else {
      resolve()
    }
  }
})

}