[OmniOS-discuss] slow ssh login, maybee to many locales?

[Zach Malone]

Alternatively, you can define reverse entries for your SSH clients (if
you control the DNS server), or just disable reverse DNS lookup in
your sshd config altogether.  Are SSH logins to localhost slow?
127.0.0.1 should be defined, so if ssh-ing from your host to itself is
quick, that would indicate a DNS issue.

On Mon, Apr 20, 2015 at 10:17 AM, Schweiss, Chip <chip at innovates.com> wrote:
> Slow ssh logon is almost always reverse DNS problems on the server side.
> Adding the client to the server's /etc/hosts will usually resolve the
> problem.
>
> -Chip
>
> On Sat, Apr 18, 2015 at 10:37 PM, PÁSZTOR György
> <pasztor at sagv5.gyakg.u-szeged.hu> wrote:
>>
>> Hi,
>>
>> I faced with that, the login onto my new omnios zone is slow.
>> I tried to debug.
>> Many of the symptoms seemed pretty the same as this:
>>
>> http://broken.net/uncategorized/resolving-slow-ssh-login-performance-problems-on-openindiana/
>>
>> Also in my case it stopped at the same point: after the kexinit sent.
>>
>> However, on my omnios, the cryptadm list showed this:
>> pasztor at omni:~$ cryptoadm list
>>
>> User-level providers:
>> Provider: /usr/lib/security/$ISA/pkcs11_kernel.so
>> Provider: /usr/lib/security/$ISA/pkcs11_softtoken.so
>>
>> Kernel software providers:
>>         des
>>         aes
>>         arcfour
>>         blowfish
>>         ecc
>>         sha1
>>         sha2
>>         md4
>>         md5
>>         rsa
>>         swrand
>>
>> Kernel hardware providers:
>> [---end of output----]
>>
>> So, in my case it did not contained the tpm module.
>> I tried the opposite: enabling the tpm module, but nothing changed.
>> (Maybe it become even slower. I did not count the seconds)
>> So, I rewert it back, and run the same truss command, which revealed this:
>> There are tons's of file openings in the /usr/lib/locale dir at that
>> point:
>>
>> 24560:   8.8232 stat("/usr/lib/locale/is_IS.UTF-8", 0x08047D48) = 0
>> 24560:   8.8234 open("/usr/lib/locale//is_IS.UTF-8/LC_CTYPE/LCL_DATA",
>> O_RDONLY) = 7
>> 24560:   8.8236 fstat(7, 0x08047658)                            = 0
>> 24560:   8.8237 mmap(0x00000000, 94904, PROT_READ, MAP_PRIVATE, 7, 0) =
>> 0xFEDE7000
>> 24560:   8.8238 close(7)                                        = 0
>> ...
>> 24560:  14.5883
>> open("/usr/lib/locale//el_GR.ISO8859-7/LC_MESSAGES/LCL_DATA", O_RDONLY) =
>> 7
>> 24560:  14.5884 fstat(7, 0x08047678)                            = 0
>> 24560:  14.6061 read(7, " ^ ( ( [EDCD ] ( [E1C1 ]".., 82)       = 82
>> 24560:  14.6063 close(7)                                        = 0
>> 24560:  14.6065 getdents64(5, 0xFEE04000, 8192)                 = 0
>> 24560:  14.6069 ioctl(1, TCGETA, 0x08046DBE)                    Err#22
>> EINVAL
>> 24560:  14.6069 fstat64(1, 0x08046E00)                          = 0
>> 24560:  14.6070 brk(0x080689D0)                                 = 0
>> 24560:  14.6071 brk(0x0806A9D0)                                 = 0
>> 24560:  14.6072 fstat64(1, 0x08046D00)                          = 0
>> 24560:  14.6074 close(5)                                        = 0
>> 24560:  14.6075 write(1, " C\n P O S I X\n a f _ Z".., 2891)    = 2891
>> 24556:  14.6076 read(3, " C\n P O S I X\n a f _ Z".., 5120)     = 2891
>> 24560:  14.6077 _exit(0)
>> 24556:  14.6080 brk(0x080D0488)                                 = 0
>> 24556:  14.6082 brk(0x080D2488)                                 = 0
>> 24556:  14.6083 read(3, 0x080CD544, 5120)                       = 0
>> 24556:  14.6084 llseek(3, 0, SEEK_CUR)                          Err#29
>> ESPIPE
>> 24556:  14.6085 close(3)                                        = 0
>> 24556:  14.6296 waitid(P_PID, 24560, 0x080473F0, WEXITED|WTRAPPED) = 0
>>
>> So, does somebody knows what is happening at that point,
>> why,
>> and how can I "fine-tune" it?
>>
>> Kind regards,
>> György Pásztor
>> _______________________________________________
>> OmniOS-discuss mailing list
>> OmniOS-discuss at lists.omniti.com
>> http://lists.omniti.com/mailman/listinfo/omnios-discuss
>
>
>
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