Re: high load caused by I/O - a hint

eleven wrote:

> Hello,
>
> This is not strictly PostgreSQL performance hint, but may be
> helpful to someone with problems like mine.
>
> As I earlier posted, I was experiencing very high load average
> on one of my Linux database servers (IBM eServer 345, SCSI disks on LSI
> Logic controller) caused by I/O bottleneck.
>
> INSERTs were really slow, even after many days of
> tweaking PostgreSQL configuration. The problem appeared to be
> in the Linux kernel itself - using acpi=ht and noapic boot parameters
> solved my performance problems. Load average dropped below 1.0
> (before, it was as high as ten in peak) and the database
> works much, much faster.

I suggest you to investigate why noapic did the work for you, do you have
not well supported device ? At your place also I'd try removing the noapic
option and using acpi=noidle

Regards
Gaetano Mendola