On Thu, May 11, 2000 at 10:54:37PM -0700, John White wrote:
If you're looking for queue speed, you want RAID 1+0 with a
NVRAM cache to accellerate the small block writes.
zeroseek would be even cooler.
Neil
--
There are two rules for success in life:
Rule 1: Don't tell people
On Fri, May 12, 2000 at 12:40:28AM -0600, Neil Schemenauer wrote:
On Thu, May 11, 2000 at 10:54:37PM -0700, John White wrote:
If you're looking for queue speed, you want RAID 1+0 with a
NVRAM cache to accellerate the small block writes.
zeroseek would be even cooler.
Don't use zeroseek!
To throw my $.02 at this issue, if this is looking like a "low level" speed
issue, why not tinker with the hardware? Taking the two disks that hold
/var and putting them on a RAID0 set should give you a serious speed boost
without touching your (otherwise working) qmail config.
-Original
On Thu, May 11, 2000 at 09:01:27AM -0400, Steve Craft wrote:
To throw my $.02 at this issue, if this is looking like a "low level" speed
issue, why not tinker with the hardware? Taking the two disks that hold
/var and putting them on a RAID0 set should give you a serious speed boost
without
At 02:40 AM 5/10/2000, Neil Schemenauer wrote:
You should find the bottleneck before you jump to any
conclusions. What version of the Linux kernel are you using?
2.2.12 compiled with higher process limit (4090), higher file and inode
limits (16000/48000), smp support, and drivers for SCSI and
On Wed, May 10, 2000 at 01:30:53AM -0700, Flemming Funch wrote:
So .. eh... would it likely be my disk I/O that slows it down
(how do I test that?), or should I be switching to FreeBSD, or
am I doing something stupid?
You should find the bottleneck before you jump to any
conclusions. What
At 09:39 AM 5/9/2000, Matthew B. Henniges wrote:
On a dual celeron 466 with 512Mb ram. and 3 10k scsi drives (one for
/var/qmail/queue, one for /var/log, one for /usr/home)
concurrency remote at 500
concurrency local at 50
FreeBSD 3.4-S
localhost dnscache
It will push 12 Million on a good day.
I have a question about qmail regarding its mail handling capacity.
How many remote emails can qmail send simulataneously, assuming it is run
on a Dual-CPU PIII 500Mhz with 512Mb RAM and a SCSI hard disk? The internet
bandwidth is 10 Mbps.
On a dual celeron 466 with 512Mb ram. and 3 10k
Another allows increasing the maximum number of
concurrent remotes beyond 250. The patch allows up to 500 but that limit
seems to be linux related.
I would imagine that to be because Linux by default only allows 1024 file
handles to be open at once. If each of the qmail-remotes has a
On Sun, May 07, 2000 at 01:17:13PM -0600, Steve Wolfe wrote:
Despite the docs at RedHat.com, saying how easy it is to
increase the file-handle limit on the new kernels, I found that
it simply didn't work. Editing the source and recompiling the
kernel (as you had to in older kernels) did the
It's not even that hard, that was the first time I had ever fiddled
with
the Kernel source. We went to 4096, which should allow for quite a few
qmail-remotes. : )
Do you have any feel for how to evaluate what is an optimum number of
remotes? At 400 remotes I still have 80% CPU idle time.
The documentation of RedHat.com is technically accurate, just not
complete. There are two limits. One is the total number of
files handles for all processes. This is adjustable through
/proc/sys/fs/file-max. The other limit is the number of file
handles opened by a single process. This
On Mon, May 08, 2000 at 10:56:43AM -0400, Bryan White wrote:
It's not even that hard, that was the first time I had ever fiddled
with
the Kernel source. We went to 4096, which should allow for quite a few
qmail-remotes. : )
Do you have any feel for how to evaluate what is an optimum
"Bryan White" [EMAIL PROTECTED] wrote:
Do you have any feel for how to evaluate what is an optimum number of
remotes?
Measure the delivery rate at various settings of concurrencyremote.
Choose the setting that yields the highest delivery rate.
At 400 remotes I still have 80% CPU idle time.
I have a question about qmail regarding its mail handling capacity.
How many remote emails can qmail send simulataneously, assuming it is run
on a Dual-CPU PIII 500Mhz with 512Mb RAM and a SCSI hard disk? The
internet
bandwidth is 10 Mbps.
If I run 2 parallel processes that sends out
On Sun, May 07, 2000 at 08:41:11AM -0400, Bryan White wrote:
[snip]
I have played with removing flush statements from qmail-queue.c. This
dramatically increases the rate at which qmail-inject puts stuff into the
queue. This led to very large queues (my sending process backs off when the
From: "Steve Wolfe" [EMAIL PROTECTED]
Date: Sat, 6 May 2000 21:22:30 -0600
. . .
Another question is about the Mail header. What is the header that I
should
add into a generated email so that undelivered/bounced emails go to this
specific email address instead? For
Dear QMail users,
I am a QMail newbie and I would like some advice on some qmail performance
issues.
I have a question about qmail regarding its mail handling capacity.
How many remote emails can qmail send simulataneously, assuming it is run
on a Dual-CPU PIII 500Mhz with 512Mb RAM and a
I have a question about qmail regarding its mail handling capacity.
How many remote emails can qmail send simulataneously, assuming it is run
on a Dual-CPU PIII 500Mhz with 512Mb RAM and a SCSI hard disk? The
internet
bandwidth is 10 Mbps.
A lot. : )
There is a hard-coded limit to
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