Merge pull request #439 from vavdoshka/patch-1

[INPUT] [Tail] Update the warning for DB parameter

Author: agup006

pipeline/inputs/tail.md

@@ -30,7 +30,7 @@ The plugin supports the following configuration parameters:
 | Tag | Set a tag \(with regex-extract fields\) that will be placed on lines read. E.g. `kube.<namespace_name>.<pod_name>.<container_name>`. Note that "tag expansion" is supported: if the tag includes an asterisk \(\*\), that asterisk will be replaced with the absolute path of the monitored file \(also see [Workflow of Tail + Kubernetes Filter](../filters/kubernetes.md#workflow-of-tail-kubernetes-filter)\). |  |
 | Tag\_Regex | Set a regex to exctract fields from the file. E.g. `(?<pod_name>[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*)_(?<namespace_name>[^_]+)_(?<container_name>.+)-` |  |
 
-Note that if the database parameter `DB` is **not** specified, by default the plugin will start reading each target file from the beginning.
+Note that if the database parameter `DB` is **not** specified, by default the plugin will start reading each target file from the beginning. This also might cause some unwanted behaviour, for example when a line is bigger that `Buffer_Chunk_Size` and `Skip_Long_Lines` is not turned on, the file will be read from the beginning each `Refresh_Interval` until the file is rotated.
 
 ### Multiline Configuration Parameters <a id="multiline"></a>