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historical进程启动失败，无法加载traffic_app_stat_log所需的segment，导致界面查询报错。\r\n\r\n查看Druid日志发现：\r\n# historical进程在反复重启，每次重启因内存溢出导致启动失败，服务器有大量程序崩溃日志hs_err_pid.log，报错内容均为OutOfMemoryError。\r\n# 进程所占内存未达到上限，服务器内存也有大量剩余，启动失败原因是加载segment时所需的内存映射地址不足，致使启动失败。\r\n\r\n出现该问题有两方面原因：\r\n# rc3与21.09版本混部，表的数量翻倍，需要加载的segment也会相应翻倍，每个historical进程加载的数量变大，且rc3版本未开启压缩功能，不会合并小文件。目前集群所需加载segment数量是200W+，不仅影响进程启动，可能也会造成慢查询现象。\r\n# 内存文件映射打开数量不够，官方建议调整Linux vm.max_map_count参数，默认参数是65536，建议调大到655360。\r\n\r\n解决方案：\r\n# 提供segment压缩脚本，rc3版本表也开启压缩任务。\r\n# 修改系统参数vm.max_map_count为655360。","updateAuthor":{"self":"https://jira.geedge.net/rest/api/2/user?username=qidaijie","name":"qidaijie","key":"JIRAUSER10135","emailAddress":"qidaijie@geedgenetworks.com","avatarUrls":{"48x48":"https://jira.geedge.net/secure/useravatar?ownerId=JIRAUSER10135&avatarId=10727","24x24":"https://jira.geedge.net/secure/useravatar?size=small&ownerId=JIRAUSER10135&avatarId=10727","16x16":"https://jira.geedge.net/secure/useravatar?size=xsmall&ownerId=JIRAUSER10135&avatarId=10727","32x32":"https://jira.geedge.net/secure/useravatar?size=medium&ownerId=JIRAUSER10135&avatarId=10727"},"displayName":"戚岱杰","active":false,"timeZone":"Asia/Shanghai"},"created":"2022-04-08T10:11:35.764+0800","updated":"2022-04-08T10:12:25.919+0800"}],"maxResults":1,"total":1,"startAt":0},"votes":{"self":"https://jira.geedge.net/rest/api/2/issue/OMPUB-434/votes","votes":0,"hasVoted":false},"worklog":{"startAt":0,"maxResults":20,"total":0,"worklogs":[]},"assignee":{"self":"https://jira.geedge.net/rest/api/2/user?username=qidaijie","name":"qidaijie","key":"JIRAUSER10135","emailAddress":"qidaijie@geedgenetworks.com","avatarUrls":{"48x48":"https://jira.geedge.net/secure/useravatar?ownerId=JIRAUSER10135&avatarId=10727","24x24":"https://jira.geedge.net/secure/useravatar?size=small&ownerId=JIRAUSER10135&avatarId=10727","16x16":"https://jira.geedge.net/secure/useravatar?size=xsmall&ownerId=JIRAUSER10135&avatarId=10727","32x32":"https://jira.geedge.net/secure/useravatar?size=medium&ownerId=JIRAUSER10135&avatarId=10727"},"displayName":"戚岱杰","active":false,"timeZone":"Asia/Shanghai"},"updated":"2022-04-20T11:08:06.820+0800","status":{"self":"https://jira.geedge.net/rest/api/2/status/10103","description":"这一问题被认为是完成, 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