postgresql-performance using sysbench

[Kris Kennaway]

Ivan Voras wrote:
> Kris Kennaway wrote:
> 
>> Write performance is something that we are working on, expect to hear
>> about progress over the coming weeks/months.
> 
> Do you have some notes or descriptions about what is being worked on?
> I'm currently doing some file system benchmarking for internal purposes
> and I'm seeing sequential read/write performance nontrivially lower on
> FreeBSD+UFS than on Linux+ext3. The Linux combination has ~~20% faster
> writes and ~~60% faster reads, on a hardware RAID10 of four 15kRPM
> drives, IBM ServeRAID 8 (file system ops / nonsequential are worse -
> send me a private message for details). Is the work that's been going on
> about lock contention or something at the low levels of the file system?
> 

Rewrite of the lockmgr primitive, for starters.  Then we'll see what 
remains.

Kris