Tom Lane wrote:
But what I wanted to see was the curve of elapsed time vs shared_buffers?
Of course! (lets just write that off to me being pre coffee...). With the patch applied: Shared Buffers Elapsed vmstat IO rate -------------- ------- -------------- 400MB 101 s 122 MB/s 2MB 101 s 1MB 97 s 768KB 94 s 512KB 84 s 256KB 79 s 128KB 75 s 166 MB/s Looks *very* similar. Cheers Mark ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster