Hello all from Community
About a mont ago, due to company decision, we moved our zabbix server enviroment to Amazon AWS. Since that we are experiencing a problem with History Write Cache value dropping on irregular times.
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Our scenraio is :
Zabbix Server AWS Site
Zabbix Server: Amazon Linux AMI - m3.medium
Zabbix FrontEnd: Amazon Linux AMI - m3.medium
ZabbixDB: MySQL 5.6.27 - db.m3.medium
And 2 Proxyes in diferent locations
Zabbix Proxy 1: CentOS 6.4 - 2 CPU´s - 6GB Ram and MySQL
Zabbix Proxy 2: CentOS 6.8 - 4 CPU´s - 4GB Ram and MySQL
Zabbix Server Conf Parameters is set to:
StartTimers=1
StartPollers=60
StartTrappers=5
StartPingers=20
StartEscalators=5
StartDBSyncers=10
SenderFrequency=60
StartJavaPollers=20
StartDiscoverers=10
StartHTTPPollers=10
StartPollersUnreachable=20
CacheUpdateFrequency=300
CacheSize=256M
TrendCacheSize=256M
ValueCacheSize=256M
HistoryCacheSize=256M
HistoryIndexCacheSize=256M
TrapperTimeout=300
UnavailableDelay=30
UnreachableDelay=30
UnreachablePeriod=60
LogSlowQueries=6000
HousekeepingFrequency=8
MaxHousekeeperDelete=1000000
#Status of Zabbix
Number of hosts (enabled/disabled/templates) 335 251 / 7 / 77
Number of items (enabled/disabled/not supported) 76328 13086 / 63242 / 0
Number of triggers (enabled/disabled [problem/ok]) 5908 3957 / 1951 [5 / 3952]
Number of users (online) 30 9
Required server performance, new values per second 152.18
#Last Mont Graphs
This Graph, show what is happening to the history write cache. As i could remember before we moved to AWS, this cache was alwys above 99%.
Every time i do a restart to Zabbix Server is flushs the cache and the then the cache start to drop again.
The other graphs shows all good to me, as we have a avg of 354+Kvps and the other proccesses is low from 10%
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Since the problem started, i have read tons of treads and tutorials in how to tune Zabbix and other related infos. Like: thread=22941 and thread=45128
Also, i have adjusted Zabbix parameters trying to solve the problem. Like increasing the HistoryCacheSize and other cache values to 512M or 1024M. Pollers and other processes to a variety of combinations. I also asked our DBA to tune some parameters in SQL. But till now, i have not found a solution to the problem or what is causing it.
Since Zabbix server only receive data from Proxyes, the log is pretty clear, the proxyes logs show noting abnormal.
I am realy out of options in how to solve this.
So this is why i started this tread. Does any buddy could give it a try?
About a mont ago, due to company decision, we moved our zabbix server enviroment to Amazon AWS. Since that we are experiencing a problem with History Write Cache value dropping on irregular times.
------------------------------------------------------
Our scenraio is :
Zabbix Server AWS Site
Zabbix Server: Amazon Linux AMI - m3.medium
Zabbix FrontEnd: Amazon Linux AMI - m3.medium
ZabbixDB: MySQL 5.6.27 - db.m3.medium
And 2 Proxyes in diferent locations
Zabbix Proxy 1: CentOS 6.4 - 2 CPU´s - 6GB Ram and MySQL
Zabbix Proxy 2: CentOS 6.8 - 4 CPU´s - 4GB Ram and MySQL
Zabbix Server Conf Parameters is set to:
StartTimers=1
StartPollers=60
StartTrappers=5
StartPingers=20
StartEscalators=5
StartDBSyncers=10
SenderFrequency=60
StartJavaPollers=20
StartDiscoverers=10
StartHTTPPollers=10
StartPollersUnreachable=20
CacheUpdateFrequency=300
CacheSize=256M
TrendCacheSize=256M
ValueCacheSize=256M
HistoryCacheSize=256M
HistoryIndexCacheSize=256M
TrapperTimeout=300
UnavailableDelay=30
UnreachableDelay=30
UnreachablePeriod=60
LogSlowQueries=6000
HousekeepingFrequency=8
MaxHousekeeperDelete=1000000
#Status of Zabbix
Number of hosts (enabled/disabled/templates) 335 251 / 7 / 77
Number of items (enabled/disabled/not supported) 76328 13086 / 63242 / 0
Number of triggers (enabled/disabled [problem/ok]) 5908 3957 / 1951 [5 / 3952]
Number of users (online) 30 9
Required server performance, new values per second 152.18
#Last Mont Graphs
This Graph, show what is happening to the history write cache. As i could remember before we moved to AWS, this cache was alwys above 99%.
Every time i do a restart to Zabbix Server is flushs the cache and the then the cache start to drop again.
The other graphs shows all good to me, as we have a avg of 354+Kvps and the other proccesses is low from 10%
------------------------------------------------------
Since the problem started, i have read tons of treads and tutorials in how to tune Zabbix and other related infos. Like: thread=22941 and thread=45128
Also, i have adjusted Zabbix parameters trying to solve the problem. Like increasing the HistoryCacheSize and other cache values to 512M or 1024M. Pollers and other processes to a variety of combinations. I also asked our DBA to tune some parameters in SQL. But till now, i have not found a solution to the problem or what is causing it.
Since Zabbix server only receive data from Proxyes, the log is pretty clear, the proxyes logs show noting abnormal.
I am realy out of options in how to solve this.
So this is why i started this tread. Does any buddy could give it a try?
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