tomcat线程池饱和度 70 告警tomcat_threads_busy_threads / tomcat_threads_config_max_threads * 100忙碌线程数/最大线程数HTTP 请求率与错误率 1%告警100 * rate(http_server_requests_seconds_count{status=~"5.."}[1m]) / rate(http_server_requests_seconds_count[1m])P95 延迟 500mshistogram_quantile(0.95, rate(http_server_requests_seconds_bucket[5m]) )P99 延迟 1shistogram_quantile(0.99, rate(http_server_requests_seconds_bucket[5m]) )全局错误总数tomcat_global_error_total发送字节数tomcat_global_sent_bytes_total接收字节数tomcat_global_received_bytes_total每秒错误数rate(tomcat_global_error_total[1m])吞吐量（Bytes/s）：rate(tomcat_global_sent_bytes_total[1m])Servlet 错误率：rate(tomcat_servlet_error_total[1m])单个 Servlet 最大处理时间tomcat_servlet_request_max_secondsJVMTenured Gen老年代 MBjvm_memory_used_bytes{id="Tenured Gen"}/1024/1024jvm_memory_max_bytes{id="Tenured G