Hello Spencer, Thursday, June 15, 2006, 11:48:57 PM, you wrote:
SS> On Thu, Robert Milkowski wrote: >> Hello nfs-discuss, >> >> Sometimes on nfs servers I get below messages and then I have >> performance problems. What are they about and what can I do about >> this? >> >> XXXX rpcmod: [ID 851375 kern.warning] WARNING: svc_cots_kdup no slots free >> XXXX last message repeated 700353 times SS> This is an error from the NFS server when it attempts to place SS> a request into the duplicate request cache and finds that SS> all of the ones in the duplicate request table are "in progress". SS> The maximum for the duplicate request cache is 1024. SS> The most effective way to increase the value is /etc/system SS> and the variable would be: rpcmod:cotsmaxdupreqs And when it finds that all requests are 'in progress' - then what? Thank you for info. btw: it looks like A LOT of messages are being sent in that case to syslog and that is perhaps one of the things which kills performance and makes whole server unresponsive. -- Best regards, Robert mailto:rmilkowski at task.gda.pl http://milek.blogspot.com
