diff options
Diffstat (limited to 'collectors/slabinfo.plugin/README.md')
| -rw-r--r-- | collectors/slabinfo.plugin/README.md | 29 |
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. + + + + +[](<>) |