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Tag: Kernel Clear

Jun 14, 2022 · Technical Articles

Linux Kernel Tuning: page allocation failure

If you start seeing these errors it means your server or instance started running out of kernel memory. [10223.291166] java: page allocation failure: order:0, mode:0x1080020(GFP_ATOMIC), nodemask=(null) [10223.301794] java cpuset=/ mems_allowed=0-1 [10223.307211] CPU: 29 PID: 19395 Comm: java Not tainted 4.14.154-99.181.amzn1.x86_64 #1 [10223.315658] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006 [10223.322004] Call Trace: [10223.325230] … Read more “Linux Kernel Tuning: page allocation failure”

Feb 8, 2020 · Technical Articles

Linux Kernel Tuning: task blocked for more than 120 seconds

This might be old school, and maybe even boring reading. But, if you concern about performance on Linux servers, at some point, you will have to have a look to the kernel messages. The problem: When we run very stressful jobs running on large servers (large number of CPU’s and RAM memory), where IO activity … Read more “Linux Kernel Tuning: task blocked for more than 120 seconds”