Hello, In production environment I have seen CPU usage go up in PHP servers, with PHP profiler showing possibly memcached(or DB or something else) as culprit. Profiler shows definite memcached being slow but also other things too, so not definite.
memcached server hardware(and hardware connecting to it) is Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01) with 10GBASE-T, short less than 5 m cat 7 cable hooked up to Cisco Nexus switch as layer 2 network. I noticed at about 400,000 memcached requests per second and at about 3~5 Gbps traffic the above problems occur(many small requests per second). Benchmarking the LAN card with simply iperf iperf3 I can easily get 9.x Gbps flow. Do you think the LAN card could be the limiting factor is such case(many small packets)? Or should such LAN cards be sufficient for such traffic and I should look elsewhere for the performance issues. Thank you. -- --- You received this message because you are subscribed to the Google Groups "memcached" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/memcached/c2c68e33-3683-46e3-8f42-5b7f0040c768n%40googlegroups.com.
