mackerel-plugin-buddyinfo

Linux buddyinfo custom metrics plugin for mackerel.io agent.

mackerel-plugin-buddyinfo is hoping to help in investigating of Linux OS error page allocation failure.

Graph examples

buddyinfo.available_pages.#.{{page_size}}

The numbers of available pages of each chunks. This can be output with -verbose option.

# is node + zone name.

Since this graph is too informative, we recommend that you use the following graphs.

buddyinfo.available_pages_summary_pct.#.{{category}}

Shows the percentages of available_pages categorized by size.

# is node + zone name.

Category:

• small: 4K, 8K, 16K, 32K
• middle: 64K, 128K, 256K, 512K
• large: 1M, 2M, 4M

buddyinfo.average_size.#

Shows the average chunk sizes of available_pages. When the value is low, memory fragmentation is in progress.

# is node + zone name.

Install

Install mkr, and run:

mkr plugin install livesense-inc/mackerel-plugin-buddyinfo

Example of mackerel-agent.conf

[plugin.metrics.buddyinfo]
command = ["/opt/mackerel-agent/plugins/bin/mackerel-plugin-buddyinfo"]

Synopsis

mackerel-plugin-odfe [-tempfile=<tempfile>] [-metric-key-prefix=<prefix>] [-verbose]

NOTE:

• -verbose option produces too many metrics. Be careful.
• This plugin outputs metrics with buddyinfo. prefix. You can change it by -metric-key-prefix option.