I will give an example of the distribution of interrupt network interfaces on the processor cores.
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For example, I’ll take a server with accel-ppp, 6Gb/s traffic, 500K + pps, nat with ipoe and 6000 dchp clients.
Also, be sure to disable hyper-threading in the BIOS, since load balancing on virtual cores can greatly increase the load on some physical cores.
Once on a single Cisco 6509e switch configured as L3 and with a standard CPU load of 10%, the load suddenly increased to 40%.
Continue reading “Cisco 6509e Net Input CPU Load”
Once, on the port of one of the L3 switches of the Cisco 6509e, to which the Huawei MA5683T was connected, I saw that Multicast traffic increased very much, while the CPU load of the switch processor increased by 30%.
Continue reading “How to catch flood on Huawei MA5600”
Phabricator is a free set of web tools for joint development of various software products, it has built-in chat, code verification, problem tracking, etc.
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Below are a few links to popular services for testing sites.
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Document Name: Configuring and tuning HPE ProLiant Servers for low-latency applications
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Edition: 10 (October 2017)
File size: 0.5 MB
I will give an example of changing join_buffer_size in MySQL.
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join_buffer_size determines the size of the buffer for index scanning and joins without indexes. I recommend adding indexes or slightly increasing join_buffer_size (but in this case a full table scan will be performed).
Enabling slow_query_log and log_queries_not_using_indexes will help to identify slow queries and queries without indexes that affect the performance of the MySQL server.
Continue reading “How to enable Slow Query Log in MySQL”