Regarding meaning for "cat /proc/net/sockstat" results

[Minoru Asano]

Hello,

I would like to know regarding "cat /proc/net/sockstat" results.

[ENVIRONMENT]
RHEL ES 3 update4

[SITUATION]
If we execute "cat /proc/net/sockstat" command, the following results
is appeared:

sockets: used 416
TCP: inuse 78 orphan 0 tw 36 alloc 337 mem 8429
UDP: inese 46
RAW: inuse 0
FRAG: inuse 0 memory 0

[QUESTION]
- What does they mean ?
I guess like following:
inuse : established TCP socket number.
orphan : ??
tw : time wait for TCP socket establish ( queuing number )
alloc : all TCP socket number ( for example, ESTABLISH, CLOSE_WAIT, TIME_WAIT, etc)
mem : total memory for TCP socket ( unit is KB ? )

[QUESTION]
- Could you suggest me about correct meaning ?

Thank you for advice.
Best Regards.
/Minoru.Asano

[Peter Godron]

Hi,

Please see:
http://www.gelato.unsw.edu.au/lxr/source/net/ipv4/proc.c
Definition of sockstat_seq_show in line 61

Also:
http://www.network-builders.com/t60903-what-is-tw-at-procnetsockstat.html

[Minoru Asano]

Hello,
Thank you for quick response.

To make sure, can I ask question again ?

- What is "tcp_orphan_count" ?
- What is unit for "tcp_memory_allocation" ? kilobyte ? or byte ?

Thank you for advice.
Best Regards.
/Minoru.Asano