Perf Reports Some Direct Jump Instructions as Memory Access Instructions

I used the following perf command to sample userspace read accesses to DRAM by evince: perf record -d –call-graph dwarf -c 100 -e mem_load_uops_retired.l3_miss:uppp /opt/evince-3.28.4/bin/evince As can be seen, I used the PEBS feature to increase the accuracy of sampling. But there are some non-memory accesses reported as memory ones. For example, this is a…

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MySQL – [Note] Got an error reading communication packets

I have deployed MySQL on OpenShift (kubernetes) with GlusterFS as persistent storage and i am getting following error continuously in MySQL Container logs 2020-01-17T18:00:04.787586Z 1541 [Note] Got an error reading communication packets 2020-01-17T18:00:06.787610Z 1543 [Note] Got an error reading communication packets 2020-01-17T18:00:08.787548Z 1544 [Note] Got an error reading communication packets 2020-01-17T18:00:10.787586Z 1546 [Note] Got an…

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