Comments (6)
zsummer
commented on June 20, 2024
另外 正常项目日志输出每秒行数峰值很少超过千行级别的, 1万的队列实际上可处理的日志每秒是10万以上级别的, 我这边测试是20万. 而实际业务中超过每秒1万的情况一般只有一个 死循环.. 这种情况下除了第一次的日志是有意义的 后面拥堵到日志队列的都是垃圾数据. 如果爆内存 很可能所有日志丢失. 所以 极端情况下丢日志的做法是相对好的选择.
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slandx
commented on June 20, 2024
@zsummer 多谢回复，的确如你所说，在我实际使用中，正常逻辑下log4z没出现丢日志的情况。我也是在测试各个日志库的性能的时候发现的这个现象。循环里只输log，什么都不干，属于极端情况。其它日志库比如glog虽然不会丢，但会把执行时间拉长。
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zsummer
commented on June 20, 2024
拉长执行时间倒也是一个不错的方法 我可以考虑再加个宏定义来切换丢日志或者短暂sleep
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zsummer
commented on June 20, 2024
目前的解决方案采用了拉长写入间隔的方式替换掉了原先丢弃日志的方式. 效果很好.
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slandx
commented on June 20, 2024
@zsummer 效果非常好！！对比了一下，3线程，每线程10万行日志，比glog快了一个数量级。
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zsummer
commented on June 20, 2024
目前单线程比多线程还快. 单线程我这里测试简单字符串能稳定跑220万/second . 复杂类型也有80万. linux下折半 简单字符串100万 复杂类型log 48万. 本来打算测试下glog和log4cpp做下对比的 一下子忙起来了. .. 没顾上
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