From a30a849b78fa4fe8552141b7b2802d1af1b18c09 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 13 Oct 2019 10:36:33 +0200 Subject: Adding upstream version 1.18.0. Signed-off-by: Daniel Baumann --- collectors/slabinfo.plugin/README.md | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 collectors/slabinfo.plugin/README.md (limited to 'collectors/slabinfo.plugin/README.md') diff --git a/collectors/slabinfo.plugin/README.md b/collectors/slabinfo.plugin/README.md new file mode 100644 index 000000000..e21802397 --- /dev/null +++ b/collectors/slabinfo.plugin/README.md @@ -0,0 +1,22 @@ +# slabinfo.plugin + +SLAB is a cache mechanism used by the Kernel to avoid fragmentation. + +Each internal structure (process, file descriptor, inode...) is stored within a SLAB. + + +## configuring Netdata for slabinfo + +There is currently no configuration needed. + +As `/proc/slabinfo` is only readable by root, this plugin is setuid root. + +## For what use + +This slabinfo details allows to have clues on actions done on your system. +In the following screenshot, you can clearly see a `find` done on a ext4 filesystem (the number of `ext4_inode_cache` & `dentry` are rising fast), and a few seconds later, an admin issued a `echo 3 > /proc/sys/vm/drop_cached` as their count dropped. + +![netdata_slabinfo](https://user-images.githubusercontent.com/9157986/64433811-7f06e500-d0bf-11e9-8e1e-087497e61033.png) + + +[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fslabinfo.plugin%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>) -- cgit v1.2.3