High CPU load when write use samba 4.3.11

[amit kumar]

Hello,

Are you configuring samba shares on cluster and writing something on shares.
Provide provide complete background of Issue. Use-case. Setup detials.

Where same smbd can write fast & where slow?
Is there some difference in 2 machine configurations?

Thanks
Amit Kumar

On 03/21/2017 05:54 PM, Zhangxiaoxu via samba-technical wrote:
> Hi samba-team,
>
> High CPU load when write use samba 4.3.11.
>
> Top command:
>     PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
> 464708 nobody    20   0 2543720 2.041g  22028 R  91.2  2.2  73:56.20 smbd
> In another server, it cost about 40% when write the same files.
>
> A lot of logs was printed during write:
> [2017/03/21 19:57:53.532109,  1] ../librpc/ndr/ndr.c:578(ndr_pull_error)
>   ndr_pull_error(11): Pull bytes 8 (../librpc/ndr/ndr_basic.c:234)
> [2017/03/21 19:57:53.532161,  1] ../source3/locking/share_mode_lock.c:312(parse_share_modes)
>   ndr_pull_share_mode_lock failed: Buffer Size Error
>
> Configuration:
> usershare allow guests = yes
> clustering = yes
> max protocol = SMB3
> large readwrite = yes
> aio write behind = true
> load printers = no
>
> Could you give us some help about the issue.
> Thanks.
>
> Br
> Zhang Xiaoxu.
>
> -------------------------------------------------------------------------------------------------------------------------------------
> 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出
> 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、
> 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本
> 邮件！
> This e-mail and its attachments contain confidential information from H3C, which is
> intended only for the person or entity whose address is listed above. Any use of the
> information contained herein in any way (including, but not limited to, total or partial
> disclosure, reproduction, or dissemination) by persons other than the intended
> recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender
> by phone or email immediately and delete it!

-- 
Thanks
Amit Kumar
There are three ways to get something done:
  (1) Do it yourself.
  (2) Hire someone to do it for you.
  (3) Forbid your kids to do it.