Re: WAL and commit_delay

On 17 Feb 2001 at 17:56 (-0500), Tom Lane wrote:

[snipped]

| Is anyone out there running a 2.4 Linux kernel?  Would you try pgbench
| with current sources, commit_delay=0, -B at least 1024, no -F, and see
| how the results change when pg_fsync is made to call fdatasync instead
| of fsync?  (It's in src/backend/storage/file/fd.c)

I've not run this requested test, but glibc-2.2 provides this bit
of code for fdatasync, so it /appears/ to me that kernel version
will not affect the test case.

[glibc-2.2/sysdeps/generic/fdatasync.c]
 int fdatasync (int fildes) {     return fsync (fildes); }


hth. brent

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