關於zabbix server出現的告警情況解釋及處理方法
一、More than 100 items having missing data for more than 10 minutes
中文解釋：超過100項數據丟失超過10分鐘
原因分析：
1.server端與proxy端時間不同步
2.server端分配的緩存不夠
3.server端分配的線程不夠
4.server端負載比較大{CPU,IO,MEM}
解決辦法：1、增大線程 2、增大緩存 具體修改參數如下
[root@localhost zabbix]# vim /usr/local/zabbix/etc/zabbix_server.conf
StartPollers=500 # zabbix server 的進程數
StartPollersUnreachable=50
StartTrappers=30
StartDiscoverers=6 # 自動發現數量
CacheSize=1G # 緩存
CacheUpdateFrequency=300 # 更新頻率（單位s）
StartDBSyncers=20 # 預先foke DB Syncers的數量
HistoryCacheSize=512M #歷史記錄緩存大小，用於存儲歷史記錄
TrendCacheSize=256M # 歷史數據緩存大小
HistoryTextCacheSize=80M # 取值範圍：128K-2G 文本類型歷史記錄的緩存大小，存儲character, text 、log歷史記錄.
ValueCacheSize=1G # 0表示禁用，history value緩存大小，當緩存超標了，將會每隔5分鐘往server日誌裏面記錄。
二、Too many processes on 10.9.19.217（zabbix server）
中文解釋：10.9.19.217(zabbix服務器)上的進程太多
可能有以下兩種情況：
1、檢查此服務器上進程是否有些無用進程，關閉即可
2、當你在此服務器上啓動的進程確實很多，此時需要去調高觸發器的值，如下圖
三、Zabbix housekeeper processes more than 75% busy。
housekeeper是什麼呢，我們從配置文件（如下）來研究
### Option: HousekeepingFrequency
# How often Zabbix will perform housekeeping procedure (in hours).
# Housekeeping is removing outdated information from the database.
# To prevent Housekeeper from being overloaded, no more than 4 times HousekeepingFrequency
# hours of outdated information are deleted in one housekeeping cycle, for each item.
# To lower load on server startup housekeeping is postponed for 30 minutes after server start.
# With HousekeepingFrequency=0 the housekeeper can be only executed using the runtime control option.
# In this case the period of outdated information deleted in one housekeeping cycle is 4 times the
# period since the last housekeeping cycle, but not less than 4 hours and not greater than 4 days.
#
# Mandatory: no
# Range: 0-24
# Default:
HousekeepingFrequency=12
### Option: MaxHousekeeperDelete
# The table "housekeeper" contains "tasks" for housekeeping procedure in the format:
# [housekeeperid], [tablename], [field], [value].
# No more than 'MaxHousekeeperDelete' rows (corresponding to [tablename], [field], [value])
# will be deleted per one task in one housekeeping cycle.
# SQLite3 does not use this parameter, deletes all corresponding rows without a limit.
# If set to 0 then no limit is used at all. In this case you must know what you are doing!
#
# Mandatory: no
# Range: 0-1000000
# Default:
MaxHousekeeperDelete=1000000
翻譯過來大概就是說從數據庫中刪除過期的歷史數據。然後HousekeepingFrequency是清理的頻率，這裏我設置爲12小時清理一次，MaxHousekeeperDelete就是一個閾值，每次輪到刪除過期歷史數據這個任務的時候，最多刪除這個閾值的行數。其實
就是對mysql進行刪除數據操作。
四、Zabbix poller processes more than 75% busy
中文解釋：zabbix輪詢的進程超過75%繁忙
告警原因：
1.某個進程卡住了，
2.殭屍進程出錯，太多，導致慢了
3.網絡延遲（可忽略）
4.zabbix消耗的內存多了
解決辦法：
修改zabbix-server.conf文件中的StartPollers（zabbix server 的進程數）參數，