diff --git a/pipeline/inputs/memory-metrics.md b/pipeline/inputs/memory-metrics.md
index 21b09ec15..82d260eda 100644
--- a/pipeline/inputs/memory-metrics.md
+++ b/pipeline/inputs/memory-metrics.md
@@ -1,6 +1,6 @@
 # Memory Metrics
 
-The **mem** input plugin, gathers the information about the memory and swap usage of the running system every certain interval of time and reports the total amount of memory and the amount of free available.
+The **mem** input plugin, gathers the information about the memory and swap usage of the running system every certain interval of time and reports the total, buffer and free memory (as reported by [sysinfo](https://man7.org/linux/man-pages/man2/sysinfo.2.html)) and the memory available and cached (as reported by `/proc/meminfo`).
 
 ## Getting Started
 
@@ -17,10 +17,10 @@ Fluent Bit v1.x.x
 * https://fluentbit.io
 
 [2017/03/03 21:12:35] [ info] [engine] started
-[0] memory: [1488543156, {"Mem.total"=>1016044, "Mem.used"=>841388, "Mem.free"=>174656, "Swap.total"=>2064380, "Swap.used"=>139888, "Swap.free"=>1924492}]
-[1] memory: [1488543157, {"Mem.total"=>1016044, "Mem.used"=>841420, "Mem.free"=>174624, "Swap.total"=>2064380, "Swap.used"=>139888, "Swap.free"=>1924492}]
-[2] memory: [1488543158, {"Mem.total"=>1016044, "Mem.used"=>841420, "Mem.free"=>174624, "Swap.total"=>2064380, "Swap.used"=>139888, "Swap.free"=>1924492}]
-[3] memory: [1488543159, {"Mem.total"=>1016044, "Mem.used"=>841420, "Mem.free"=>174624, "Swap.total"=>2064380, "Swap.used"=>139888, "Swap.free"=>1924492}]
+[0] memory: [1488543156, {"Mem.total"=>2037988, "Mem.used"=>1890616, "Mem.free"=>147372, "Mem.available"=>1236028, "Mem.buffer"=>92020, "Mem.cache"=>1374616}]
+[1] memory: [1488543157, {"Mem.total"=>2037988, "Mem.used"=>1890616, "Mem.free"=>147372, "Mem.available"=>1236028, "Mem.buffer"=>92020, "Mem.cache"=>1374616}]
+[2] memory: [1488543158, {"Mem.total"=>2037988, "Mem.used"=>1890616, "Mem.free"=>147372, "Mem.available"=>1236028, "Mem.buffer"=>92020, "Mem.cache"=>1374616}]
+[3] memory: [1488543159, {"Mem.total"=>2037988, "Mem.used"=>1890616, "Mem.free"=>147372, "Mem.available"=>1236028, "Mem.buffer"=>92020, "Mem.cache"=>1374616}]
 ```
 
 ### Configuration File