I use sernet-samba package (version 4.0.9-6) on Debian 7. Samba configured
as additional AD controller. Samba process infinitely writes something to
disk and makes high I/O load:
Total DISK READ: 0.00 B/s | Total DISK WRITE: 204.37 K/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
140 be/3 root 0.00 B/s 0.00 B/s 0.00 % 58.45 % [jbd2/vda1-8]
4081 be/4 root 0.00 B/s 110.05 K/s 0.00 % 3.49 % samba -D
It is not logs, I think, because they relatively small.
/etc/samba/smb.conf
# Global parameters
[global]
workgroup = DALSTRAZH
realm = dalstrazh.localnet
netbios name = SAMBA4K76
server role = active directory domain controller
server services = rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
winbind, ntp_signd, kcc, dnsupdate, smb
dcerpc endpoint servers = +winreg +srvsvc
log level = 1
[netlogon]
path = /var/lib/samba/sysvol/dalstrazh.localnet/scripts
read only = No
[sysvol]
path = /var/lib/samba/sysvol
read only = No
lsof -p 4081 - http://pastebin.com/BZVuNyA2
mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=217587,mode=755)
devpts on /dev/pts type devpts
(rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=313936k,mode=755)
/dev/disk/by-uuid/b7ff5fd8-dc08-4b00-be23-6c9c91eecec5 on / type ext4
(rw,noatime,errors=remount-ro,user_xattr,commit=60,barrier=1,data=writeback)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=909660k)
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
data=journal and data=ordered takes no effect.
On second server (with same configuration) i/o seems normal.
How to find file which causes this problem, and how to fix it?
