>Number:         3937
>Category:       port-i386
>Synopsis:       
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug  4 11:50:03 1997
>Last-Modified:
>Originator:     Matthias Meyser
>Organization:
XeNET GmbH, Clausthal-Zellerfeld
>Release:        1.2.1
>Environment:
Intel P200
		128 MB Ram
		ADAPTEC 3940 SCSI Controler
		3x4.3 GB disks ccd`d for newsspool
		4,3 GB disk
		3COM 905 PCI Ethernetcard
		NKPDE set to 16 as mentioned in the faq
		NMBCLUSTERS set to 1024 (nm_map full error)
System: NetBSD xenetserver.harz.de 1.2.1 NetBSD 1.2.1 (XENETSERVER) #8: Tue Jul 22 13:02:54 MET DST 1997 root@xenetserver.harz.de:/usr/src/sys/arch/i386/compile/XENETSERVER i386


>Description:
	During mid to high traffic on a nfs mounted directory
	the nfs serving machine randomly locks.
	Lokal login still works. But nothing works over the LAN exept
	pinging the locked machine. rlogin, telnet, schowmount ... just hangs.
	This happens on all (3) of our machines.
	
>How-To-Repeat:
	export a central maildirectory via nfs. Mount ist on an
	other machine. Start 100 times your favority mailreader on this
	machine.  After x times ( 1<=x<100 ) the nfs exporting machine locks.
>Fix:
	Increasing MBCLUSTER cured this problem a little bit, but not
	completly.
>Audit-Trail:
>Unformatted: