Re: pgsql: Use pg_pread() and pg_pwrite() for data files and WAL.

On 11/6/18 4:01 PM, Thomas Munro wrote:
> Use pg_pread() and pg_pwrite() for data files and WAL.
>
> Cut down on system calls by doing random I/O using offset-based OS
> routines where available.  Remove the code for tracking the 'virtual'
> seek position.  The only reason left to call FileSeek() was to get
> the file's size, so provide a new function FileSize() instead.


Getting this warning (gcc 8.2.1 Fedora 29):


Nov 06 17:18:55 
/home/bf/bfr/root/HEAD/pgsql.build/../pgsql/src/backend/storage/file/fd.c: 
In function ‘FileSize’:
Nov 06 17:18:55 
/home/bf/bfr/root/HEAD/pgsql.build/../pgsql/src/backend/storage/file/fd.c:2007:11: 
warning: variable ‘vfdP’ set but not used [-Wunused-but-set-variable]
Nov 06 17:18:55   Vfd     *vfdP;
Nov 06 17:18:55            ^~~~


cheers


andrew



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Andrew Dunstan                https://www.2ndQuadrant.com
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