Fragmentation of WAL files

[Jim Nasby <decibel@xxxxxxxxxxx>]

I was recently running defrag on my windows/parallels VM and noticed  
a bunch of WAL files that defrag couldn't take care of, presumably  
because the database was running. What's disturbing to me is that  
these files all had ~2000 fragments. Now, this was an EnterpriseDB  
database which means the WAL files were 64MB instead of 16MB, but  
even having 500 fragments for a 16MB WAL file seems like it would  
definitely impact performance.

Can anyone else confirm this? I don't know if this is a windows-only  
issue, but I don't know of a way to check fragmentation in unix.
--
Jim Nasby                                            jim@xxxxxxxxx
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)