5.1-p10 lockups

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Hi

Last days i'm having big troubles with my 5.1-p10 box. It's dual p3
1.2MHz, 1G of ecc ram with 900G on pst0 raid5 disk array.

Kernel configuration is attached.

My problems are lockups when i test apache (2.0.47, php 4.3.3 + turck
mmcache and horde imp webmail) this machine with JMeter. Machine locks
up after approx. 5-10 seconds of jmeter test.

That weird, becouse if i stress test mail server on this machine, it
passes 24 test without problem.

When lockup accours, there are no kernel messages on console, machine
stop responding to echo requests (ping). There is nothing in syslog logs...

Bad hardware is not an option.

Should i rebuild kernel with debugging options?

But as far i see, kernel does not crash, it just locks up.

Regards, Brane

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#
# GENERIC -- Generic kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files. 
# If you are in doubt as to the purpose or necessity of a line, check first 
# in NOTES.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.384.2.2 2003/05/31 15:18:41 scottl Exp $

machine		i386
cpu		I686_CPU
ident		MYNAME

options 	SCHED_4BSD		#4BSD scheduler
options 	INET			#InterNETworking
options 	FFS			#Berkeley Fast Filesystem
options 	SOFTUPDATES		#Enable FFS soft updates support
options 	UFS_ACL			#Support for access control lists
options 	UFS_DIRHASH		#Improve performance on big directories
options 	NFSCLIENT		#Network Filesystem Client
options 	NFSSERVER		#Network Filesystem Server
options 	CD9660			#ISO 9660 Filesystem
options 	COMPAT_43		#Compatible with BSD 4.3 [KEEP THIS!]
options 	COMPAT_FREEBSD4		#Compatible with FreeBSD4
options 	KTRACE			#ktrace(1) support
options 	SYSVSHM			#SYSV-style shared memory
options 	SYSVMSG			#SYSV-style message queues
options 	SYSVSEM			#SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

# To make an SMP kernel, the next two are needed
options 	SMP			# Symmetric MultiProcessor Kernel
options 	APIC_IO			# Symmetric (APIC) I/O

device		isa
device		pci

# Floppy drives
device		fdc

# ATA and ATAPI devices
device		ata
device		atadisk			# ATA disk drives
device		atapicd			# ATAPI CDROM drives
options 	ATA_STATIC_ID		#Static device numbering

# RAID controllers
device		pst		# Promise Supertrak SX6000

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc		# AT keyboard controller
device		atkbd		# AT keyboard
device		psm		# PS/2 mouse
device		vga		# VGA video card driver
# device		splash		# Splash screen and screen saver support

# syscons is the default console driver, resembling an SCO console
device		sc

# Floating point support - do not disable.
device		npx

# Power management support (see NOTES for more options)
#device		apm
# Add suspend/resume support for the i8254.
#device		pmtimer

# Serial (COM) ports
device		sio		# 8250, 16[45]50 based serial ports

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device		miibus		# MII bus support
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)

# Pseudo devices - the number indicates how many units to allocate.
device		random		# Entropy device
device		loop		# Network loopback
device		ether		# Ethernet support
device		tun		# Packet tunnel.
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
# device		bpf		# Berkeley packet filter


# konzola
options		SC_DISABLE_REBOOT

#options         ROOTDEVNAME=\"ufs:da0s2e\"
# root device
options		ROOTDEVNAME=\"ufs:pst0s1a\"


# vklopi configfajl v kernel
options		INCLUDE_CONFIG_FILE


# linux
options		COMPAT_LINUX