Re: Poor performance on Solaris
On Fri, Feb 25, 2011 at 10:25 AM, Howard Chu <hyc(a)symas.com> wrote:
I will note that if you are going to use slowaris, I highly advise you set
> a memory key rather than using on disk cache for BDB if your DB is any
> size
> over about 4 GB. Other than that, you'll generally just have to deal with
> the fact it will be significantly slower than Linux.
>
Actually, you should always use a shared memory key on Solaris. Using
mmap'd files is just too slow on that OS.
Incidentlly, What is the uniqueness of a shared memory key, is it unique
amoung all instances on a single server ?
I have personally only ever needed a shared memory key on one of a group of
ldap servers.
But i noticed that the bdb logs are not written to disk when shared memory
is configured, is this a good or bad thing ?
If the power is lost, without bdb logs, could this leave bdb in an
unrecoverable state ?
Cheers
Brett
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