CPU at 100% with orphan SMBD processes

[Rowland Penny]

On 09/04/15 15:04, Andrew/ wrote:
> I have Samba 3.6.6 running [on a Raspberry Pi B+, although that 
> shouldn't matter] and primarily use the shares from a Win-7 [Pro] box 
> and it works marvellously, except I keep getting smbd processes 
> running using all available CPU and smbd performance drops away to 
> appallingly slow speeds.
>
> All the shares are on a USB SSD drive or a Seagate GoFlex 2TB HDD both 
> of which are formatted to ext4.
>
> I've had up to 16 processes all equally sharing the available CPU. 
> When 1 it uses 98% CPU, with two 49% etc. as soon as these orphan 
> processes are killed performance returns to acceptable levels but 
> additional processes soon seem to be created.
>
> I've had two new processes created today and all I was doing was 
> browsing the file shares.
>
> The log levels are still at the defaults and nothing seems to be 
> written to any logs.
>
> I've searched and there seem to be a lot of similar problems on WD 
> linux based NAS and Synology linux based NAs both of which, I assume, 
> are using Samba for file shares.
>
> Is this a recognised problem? Is there a solution?
>
> Thanks,
> Andrew/

Hi, can you upgrade to 4.1.17 from backports and see if the problem goes 
away. Samba 3.6.x has gone EOL and will probably get no more updates, so 
the update is really your only chance of getting your problem fixed.

Rowland