Tune Zabbix MySQL DB

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There are many guides for tuning Zabbix and DB.

Here’s what I did in my environment (only DB):

innodb_buffer_pool_size = 2G
innodb_buffer_pool_instances = 8
innodb_flush_log_at_trx_commit = 0
innodb_io_capacity = 500

Bufferbloat sites and articles

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https://www.bufferbloat.net/projects/

https://www.reddit.com/r/networking/comments/3binop/top_of_rack_switching_suggestions/

https://people.ucsc.edu/~warner/buffer.html

http://www.snookles.com/slf-blog/2012/01/05/tcp-incast-what-is-it/

https://sourceforge.net/p/e1000/mailman/e1000-devel/thread/505390FD.1030607%40intel.com/#msg29811601

https://fasterdata.es.net/

http://blog.lah.io/2013/10/cisco-catalyst-4500-x-etherchannel-auto.html

http://blog.performancevision.com/eng/earl/links-between-latency-throughput-and-packet-loss

http://www.cisco.com/c/en/us/support/docs/lan-switching/switched-port-analyzer-span/116260-technote-wireshark-00.html

Queueing in the Linux Network Stack

Bufferbloat in switches/bridges

Debug interface drops I

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Important commands to debug interface drops on Catalyst 3650/3850:

 

sh interfaces gi1/0/XX

sh interfaces gi1/0/XX counters errors

sh controllers ethernet-controller gigabitEthernet 1/0/XX

sh platform qos queue config gigabitEthernet 1/0/XX

sh platform qos queue stats gigabitEthernet 1/0/XX

 

 

Important links:

http://www.cisco.com/image/gif/paws/12027/53.pdf

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/200594-Catalyst-3850-Troubleshooting-Output-dr.html