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--- linux_wiki:kernel_tuning [2015/10/04 00:45]
billdozor
+++ linux_wiki:kernel_tuning [2019/05/25 23:50] (current)
@@ Line 6: / Line 6: @@
 **Checklist**
-  * Any distro, but many examples are done via Red Hat based systems
+  * Distro(s): Any
 ----
-===== Hugepages =====
+====== Hugepages ======
 Problem: Unable to access a VM's console, and it shows out of memory errors on boot.
@@ Line 25: / Line 25: @@
 Alternative config location: Hugepages could also be configured at /boot/grub/grub.conf
+----
 ==== HugePage Bug ====
@@ Line 51: / Line 53: @@
 # Disable kernel huge page defrag due to bugzilla bug: 879801
-@reboot root /bin/echo never | /usr/bin/tee /sys/kernel/mm/transparent_hugepage/defrag
+@reboot root /bin/echo never > /sys/kernel/mm/transparent_hugepage/defrag
 </code>
@@ Line 62: / Line 64: @@
 ----
-===== Swappiness =====
+====== Swappiness ======
 Swappiness controls how likely the kernel is to move processes out of memory and onto swap disk space.
@@ Line 91: / Line 93: @@
 ----
-===== Page Cache =====
+====== Page Cache ======
 Tuning how often cached pages in memory are flushed to disk.
@@ Line 116: / Line 118: @@
 ----
-===== File Descriptors =====
+====== File Descriptors ======
 Viewing and setting the system wide file descriptors.
@@ Line 143: / Line 145: @@
 ----
+====== Kernel Panic ======
+Reboot a system after a 10 seconds of kernel panic
+<code bash>
+kernel.panic = 10
+</code>
+----