SUMMARY: automountd[151]: server xxxx not responding

From: Mike Legako X5355 BLD 551 1 P5 (legako@ew01.ew)
Date: Tue Apr 08 1997 - 12:26:59 CDT


        Hi fellow administrators:
        
        THE PROBLEM:

        I am experiencing the following problem with NFS on an Ultra Sparc
Model 140 running Solaris 2.5.1 (OS 5.5.1):

Feb 28 09:27:25 ew06 automountd[151]: server ew01 not responding
Feb 28 09:27:40 ew06 automountd[151]: server ew05 not responding

        Both of the servers above are Sparc 2's running OS 4.1.3 (slow servers).
        
        INDICATIONS:
        The true nature of the problem was best indicated by running
        vmstat -s on the Ultra Sparc client. Near the end of this report:

 20019064 total name lookups (cache hits 56%)

        The cache hits were too low. Acceptable performance is only achieved
when cache hits are > 90%.

        THE SOLUTION:
        The largest single improvement in performance is due to a single change
on the Ultra Sparc Client. Adding the actimeo=300 option to its
/etc/auto.master file for all server mount points (including those above) as
follows made a LARGE difference in observable performance. Cache hits now
average 98%.

        CREDIT:
        (See References)
        No one responded to this query. It was posted two months ago.

        References:
        1) "SMCC NFS Performance and Tuning Guide", Solaris 2.5 SMCC Manual,
           Sun Microsystems. (Available in the on-line answerbook).
        2) Cockcroft, Adrian. "Sun Performance and Tuning", Sun Microsystems,
           1995.
        3) Stern, Hal. "Managing NFS and NIS", O'Reilly.
        



This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:11:50 CDT