Configuration:
FreeBSD 4.4-RELEASE apache+mod_ssl-1.3.22+2.8.5_1 mysql-server-3.23.42 Hard Drive (dual ATA disks, no RAID) on a Dell P4 PowerEDGE server
We had many speed and timeout issues so we recompiled the kernel with maxusers=128 instead of the previous 32 and moved the hard drives into a new P4 2.8Ghz PowerEdge Case.
What model number Poweredge ? (so we can examine specifications if need be). The amount and type of RAM would be good to know as well.
atapci0: <Generic PCI ATA controller> port 0xffa0-0xffaf,0x374-0x377,0x170-
0x177,0x3f4-0x3f7,0x1f0-0x1f7 irq 11 at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
atapci1: <Generic PCI ATA controller> port 0xfea0-0xfeaf,0xfe30-0xfe33,0xfe20-
0xfe27,0xfe10-0xfe13,0xfe00-0xfe07 mem 0xdff3fc00-0xdff3ffff irq 5 at device 31.2 on pci0
ata2: at 0xfe00 on atapci1
ata3: at 0xfe20 on atapci1
FreeBSD 4.4 is detecting a 'Generic PCI ATA Controller', which may mean the capabilities are very dumped down (and performance is poor) - as no doubt other posters will mention, let me suggest 4.10 or 4.11 for better HW detection :-)
If we run pine on a large mailbox or any other disk i/o intensive task, all other processes in motion seem to stall until the disk i/o is complete.
This manifests itself in timeouts on webpages that require DB data, IMAP timeouts for other mail accounts, and even odd console/shell behaviour.
An additional possibility is that your old hard drives are becoming worn out. It is probably worth buying 2 fast new ones (maybe SATA if your Dell supports it - I suspect you will *need* be off 4.4 before trying this tho!).
regards
Mark
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