Adding upstream version 1.29.3.upstream/1.29.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/collectors/slabinfo.plugin/README.md b/collectors/slabinfo.plugin/README.md
new file mode 100644
index 0000000..21d83c9
--- /dev/null
+++ b/collectors/slabinfo.plugin/README.md
@@ -0,0 +1,29 @@
+<!--
+title: "slabinfo.plugin"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/slabinfo.plugin/README.md
+-->
+
+# 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
+
+The plugin is disabled by default because it collects and displays a huge amount of metrics.
+To enable it set `slabinfo = yes` in the `plugins` section of the `netdata.conf` configuration file.
+
+There is currently no configuration needed for the plugin itself.
+
+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)](<>)