I'm looking for a tool to show what portion of a file is in the file system cache. In the past I have used the fincore tool that is part of the linux-ftools package. linux-ftools isn't in any of the distributions that I use and hasn't been updated since 2012.
1 Answer
You can use vmtouch for this...
To see how much of SYSERR.TXT is in the file system cache,
[root@GreenLeaf /ppro/data]# vmtouch -v SYSERR.TXT
SYSERR.TXT
[OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO] 1859/1859
Files: 1
Directories: 0
Resident Pages: 1859/1859 7M/7M 100%
Elapsed: 0.000316 seconds
100% of it is!