Hello!
My problem aroused after installing a new 3-way raid controller and a new
10/100Mb network interface card into an alphaserver 400.
In order to connect tu0 to my net I had to upgrade fra DU v4.0B to v4.0D
at the same time.
The problem is: After serving NFS- and samba-services for dome time the
server reports; 
Nov 18 13:43:58 harald vmunix: malloc_mem_alloc: no space in map (*)
and NFS and CIFS-services do no respond.
I'm able to log into the machine with ssh or telnet and make a reboot and
then the services is up once more.
No coredump, neither an entry in the uerf-log is to be found.
Only the line (*) from /var/adm/messages.
In order to fix the problem the machine is upgraded from 64MB to 192MB ram
without signifcant change.
I've tried to use immediate mode for swap space allocation without any
success. Swap space is 384MB without change. When I check swapon reports 
3-5% in use
The 3-way raid controller is connected to a StorageWorks-box (a
350-something) with 7*RZ29B (narrow) in a raid5-diskvolume.
Regards,
Kjell Andresen  Systems administrator, University of Oslo, Norway
                Center for Information Technology Services and
                Department of Geophysics
PS: I've searched many places for malloc_mem_alloc without a hit.
-----------------------------------------------------------------------
Here is the log:
Firstly: Dates of trouble, namely #1 to #14
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
harald /var/adm# grep malloc messages 
Jul 16 16:16:28 harald vmunix: malloc_mem_alloc: no space in map #1
Jul 29 16:16:54 harald vmunix: malloc_mem_alloc: no space in map
Aug  7 10:45:03 harald vmunix: malloc_mem_alloc: no space in map
Aug 14 09:55:13 harald vmunix: malloc_mem_alloc: no space in map
Aug 21 11:40:24 harald vmunix: malloc_mem_alloc: no space in map #5
Sep  7 14:18:31 harald vmunix: malloc_mem_alloc: no space in map
Sep 17 14:54:47 harald vmunix: malloc_mem_alloc: no space in map
Sep 29 18:26:49 harald vmunix: malloc_mem_alloc: no space in map
Oct 13 18:30:08 harald vmunix: malloc_mem_alloc: no space in map
Oct 21 15:16:05 harald vmunix: malloc_mem_alloc: no space in map
Oct 30 10:32:06 harald vmunix: malloc_mem_alloc: no space in map #11
Nov  9 16:01:36 harald vmunix: malloc_mem_alloc: no space in map 
Nov 11 11:31:42 harald vmunix: malloc_mem_alloc: no space in map #13
Nov 18 13:43:58 harald vmunix: malloc_mem_alloc: no space in map
Secondly: Actions and Problem solving:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#0  Wed Jun 17 16:34:51 1998:	xcr0, the raid-set and the NIC
                                DE-500 set up. v4.0B, 64MB ram
                                swapmode is deferred mode.
    Wed Jun 17 20:50:14 1998:	Upgraded to DU v4.0D. tu0 up
                                (DEC TULIP (10/100))
#1  Thu Jul 16 16:49:54 1998:	First time malloc_mem_alloc error
                                (July is holyday month here, (*))
#5  Fri Aug 21 12:09:30 1998:	upgraded to 192MB ram
#11 Fri Oct 30 11:45:46 1998:	one fileset on raid_domain 112% full
    Tue Nov  3 07:26:15 1998:   New swapmode: immediate mode set
#13 Mon Nov  9 17:16:01 1998:	Back to deferred mode swapping.
(*) November is just before exam and delivery of main subjects..
Thirdly: Some swap statistics:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
harald /var/adm# swapon -s
Swap partition /dev/rz0b:
    Allocated space:        49152 pages (384MB)
    In-use space:            1486 pages (  3%)
    Free space:             47666 pages ( 96%)
Total swap allocation:
    Allocated space:        49152 pages (384MB)
    In-use space:            1486 pages (  3%)
    Available space:        47666 pages ( 96%)
harald /var/adm# man pstat
No reference page found for pstat.
harald /var/adm# vmstat -P
Total Physical Memory =   192.00 M
                      =    24576 pages
Physical Memory Clusters:
 start_pfn     end_pfn        type  size_pages / size_bytes
         0         249         pal         249 /    1.95M
       249       24575          os       24326 /  190.05M
     24575       24576         pal           1 /    8.00k
Physical Memory Use:
 start_pfn     end_pfn        type  size_pages / size_bytes
       249         277   unixtable          28 /  224.00k
       277         283    scavenge           6 /   48.00k
         *
       277         280    scavenge           3 /   24.00k
         *
       283         673        text         390 /    3.05M
       673         750        data          77 /  616.00k
       750         862         bss         112 /  896.00k
       863         983      kdebug         120 /  960.00k
       983         988     cfgmgmt           5 /   40.00k
         *
       990        1035   unixtable          45 /  360.00k
         *
      1048        1410    vmtables         362 /    2.83M
      1410       24575     managed       23165 /  180.98M
                             ============================
         Total Physical Memory Use:      24313 /  189.95M
Managed Pages Break Down:
       free pages = 974
     active pages = 808
   inactive pages = 777
      wired pages = 5340
        ubc pages = 15272
        ==================
            Total = 23171
WIRED Pages Break Down:
   vm wired pages = 1086
  ubc wired pages = 1628
  meta data pages = 1459
     malloc pages = 786
     contig pages = 11
    user ptepages = 343
  kernel ptepages = 19
    free ptepages = 8
        ==================
            Total = 5340
harald /var/adm# uptime
14:10  up 1 day, 17 mins,  3 users,  load average: 0.01, 0.05, 0.05
Received on Thu Nov 19 1998 - 13:14:13 NZDT