[Samba] smbd process grows to 25Mb resident size

Duncan Brannen dbb at st-andrews.ac.uk
Mon May 22 12:08:24 GMT 2006

    I've 4 Samba servers running 3.0.21c in solaris 10 zones.  One PDC, 
3 BDCs.
The machines are identically installed and the samba binaries and 
associated libraries
are copied between the machines so are also identical.

On my PDC which seems to be accepting almost all of the clients, my smbd 
are 33M with 25M resident.  This seems to be used by dev:32,0 ino301938 
,see pmap
below, which is a similar size on most smbd processes.  I can see some 
where it's 8k.

Any idea what might be causing this and is it possible to cap it at 
all?  Is it normal and
nothing to be concerned about?

It seems to be related to how busy the server is as my BDCs, which only 
seem to pick
up between 10 and 60 clients at any one time have footprints of around 8 
to 10 MB.

The PDC has over 300 clients at any one time.  It's not causing any 
major problems
but the PDC will eventually run out of RAM as we add clients unless I 
can somehow
slow it down from being first to respond to domain logon requests.

(Is that possible and is having the PDC as the wins server what causes 
that? They all have
very similar ping times from a given client and are spread across our 
network as the clients


> 26029:  /usr/local/samba/sbin/smbd -D
> 00010000    2832K r-x--  /usr/local/samba/sbin/smbd
> 002E2000      48K rwx--  /usr/local/samba/sbin/smbd
> 002EE000    1320K rwx--    [ heap ]
> FD080000    1224K rw-s-  dev:32,0 ino:301936
> FD200000    1736K rw-s-  dev:32,0 ino:301937
> FD400000   20288K rw-s-  dev:32,0 ino:301938
> FE900000     168K rw-s-  dev:32,0 ino:301940
> FE930000      24K r-x--  /lib/nss_nis.so.1
> FE946000       8K rwx--  /lib/nss_nis.so.1
> FE950000       8K rw-s-  dev:32,0 ino:301950
> FE960000       8K rw-s-  dev:32,0 ino:301949
> FE970000       8K rw-s-  dev:32,0 ino:301945
> FE980000       8K rw-s-  dev:32,0 ino:301948
> FE990000       8K rw-s-  dev:32,0 ino:301942
> FE9A0000       8K rw-s-  dev:32,0 ino:301941
> FE9D0000       8K rw-s-  dev:32,0 ino:301939
> FE9E0000       8K rwxs-    [ anon ]
> FE9F0000       8K r-x--  /lib/libdoor.so.1
> FEA02000       8K rwx--  /lib/libdoor.so.1
> FEA10000       8K r-x--  /usr/local/lib/libcom_err.so.1.1.1
> FEA20000       8K rwx--  /usr/local/lib/libcom_err.so.1.1.1
> FEA30000      72K r-x--  /usr/local/lib/libroken.so.16.1.0
> FEA50000       8K rwx--  /usr/local/lib/libroken.so.16.1.0
> FEA60000     256K r-x--  /usr/local/lib/libncurses.so.5.4
> FEAAE000      48K rwx--  /usr/local/lib/libncurses.so.5.4
> FEAC0000     160K r-x--  /usr/local/lib/libasn1.so.6.1.0
> FEAF6000       8K rwx--  /usr/local/lib/libasn1.so.6.1.0
> FEB00000     264K r-x--  /usr/local/lib/libkrb5.so.17.4.0
> FEB50000      24K rwx--  /usr/local/lib/libkrb5.so.17.4.0
> FEB60000      80K r-x--  /usr/local/lib/libgssapi.so.4.0.0
> FEB82000      16K rwx--  /usr/local/lib/libgssapi.so.4.0.0
> FEB90000      80K r-x--  /lib/nss_ldap.so.1
> FEBB2000      16K rwx--  /lib/nss_ldap.so.1
> FEBB6000      40K rwx--  /lib/nss_ldap.so.1
> FEBD0000      24K r-x--  /lib/nss_files.so.1
> FEBE6000       8K rwx--  /lib/nss_files.so.1
> FEBF0000       8K rw-s-  dev:32,0 ino:301751
> FEC00000      64K rwx--    [ anon ]
> FEC20000       8K rw-s-  dev:32,0 ino:199483
> FEC30000      64K r--s-  dev:32,0 ino:199406
> FEC50000       8K rwx--    [ anon ]
> FEC60000       8K r-x--  /usr/lib/iconv/CP850%UTF-16LE.so
> FEC70000       8K rwx--  /usr/lib/iconv/CP850%UTF-16LE.so
> FEC80000       8K r-x--  /usr/lib/iconv/8859-15%UTF-16LE.so
> FEC90000       8K rwx--  /usr/lib/iconv/8859-15%UTF-16LE.so
> FECA0000       8K r-x--  /usr/lib/iconv/UTF-16LE%CP850.so
> FECB0000       8K rwx--  /usr/lib/iconv/UTF-16LE%CP850.so
> FECC0000       8K r-x--  /usr/lib/iconv/UTF-16LE%8859-15.so
> FECD0000       8K rwx--  /usr/lib/iconv/UTF-16LE%8859-15.so
> FECE0000      16K r-x--  
> /usr/lib/locale/en_GB.ISO8859-15/en_GB.ISO8859-15.so.3
> FECF2000      16K rwx--  
> /usr/lib/locale/en_GB.ISO8859-15/en_GB.ISO8859-15.so.3
> FED00000       8K rwx--    [ anon ]
> FED20000     128K r--s-  dev:32,0 ino:199403
> FED50000     128K r--s-  dev:32,0 ino:199404
> FED80000    1432K r-x--  /usr/local/ssl/lib/libcrypto.so.0.9.8
> FEEF4000      88K rwx--  /usr/local/ssl/lib/libcrypto.so.0.9.8
> FEF0A000       8K rwx--  /usr/local/ssl/lib/libcrypto.so.0.9.8
> FEF20000       8K r-x--  /platform/sun4u-us3/lib/libc_psr.so.1
> FEF30000      24K rwx--    [ anon ]
> FEF40000       8K rwx--    [ anon ]
> FEF50000      16K r-x--  /lib/libcmd.so.1
> FEF64000       8K rwx--  /lib/libcmd.so.1
> FEF70000     264K r-x--  /usr/local/ssl/lib/libssl.so.0.9.8
> FEFC0000      24K rwx--  /usr/local/ssl/lib/libssl.so.0.9.8
> FEFD0000      88K r-x--  /usr/local/lib/libsasl2.so.2.0.21
> FEFF4000       8K rwx--  /usr/local/lib/libsasl2.so.2.0.21
> FF000000     848K r-x--  /lib/libc.so.1
> FF0E4000      32K rwx--  /lib/libc.so.1
> FF0EC000       8K rwx--  /lib/libc.so.1
> FF100000      32K r-x--  /usr/local/lib/libgcc_s.so.1
> FF116000      16K rwx--  /usr/local/lib/libgcc_s.so.1
> FF120000       8K rwx--    [ anon ]
> FF130000      24K r-x--  /lib/libgen.so.1
> FF146000       8K rwx--  /lib/libgen.so.1
> FF150000      48K r-x--  /lib/libsocket.so.1
> FF16C000       8K rwx--  /lib/libsocket.so.1
> FF180000     584K r-x--  /lib/libnsl.so.1
> FF222000      40K rwx--  /lib/libnsl.so.1
> FF22C000      24K rwx--  /lib/libnsl.so.1
> FF240000      32K r-x--  /usr/lib/libpopt.so.0.0.0
> FF256000       8K rwx--  /usr/lib/libpopt.so.0.0.0
> FF260000     240K r-x--  /lib/libresolv.so.2
> FF2AC000      16K rwx--  /lib/libresolv.so.2
> FF2C0000       8K r-x--  /lib/libsendfile.so.1
> FF2D2000       8K rwx--  /lib/libsendfile.so.1
> FF2E0000       8K r-x--  /lib/libsec.so.1
> FF2F2000       8K rwx--  /lib/libsec.so.1
> FF300000       8K rwx--    [ anon ]
> FF310000      24K r-x--  /lib/libpam.so.1
> FF326000       8K rwx--  /lib/libpam.so.1
> FF330000      40K r-x--  /usr/local/lib/liblber-2.3.so.0.2.8
> FF348000      16K rwx--  /usr/local/lib/liblber-2.3.so.0.2.8
> FF350000     208K r-x--  /usr/local/lib/libldap-2.3.so.0.2.8
> FF392000      24K rwx--  /usr/local/lib/libldap-2.3.so.0.2.8
> FF3A0000       8K r-x--  /lib/libdl.so.1
> FF3B0000     176K r-x--  /lib/ld.so.1
> FF3EC000       8K rwx--  /lib/ld.so.1
> FF3EE000       8K rwx--  /lib/ld.so.1
> FF3F8000      16K r-x--  /lib/libthread.so.1
> FFBF6000      40K rwx--    [ stack ]
>  total     33928K

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