pg_stat_get_backend_pid seems to be listing non existant pids !!

Hi Folks,
please help ,

therse seems to be too much lag between the access collector
and system status. even the pids of backend does not seems to be matching.

tradein_clients=# SELECT pg_stat_get_backend_pid(s.backendid) AS procpid,
pg_stat_get_backend_activity(s.backendid) AS current_query FROM (SELECT
pg_stat_get_backend_idset() AS backendid) s;

procpid | current_query
---------+-------------------------------
27134 | <IDLE> in transaction
26958 | <IDLE> in transaction
26953 | <IDLE> in transaction
26960 | <IDLE> in transaction
27008 | <IDLE> in transaction
12839 | <IDLE>
26977 | <IDLE> in transaction
27012 | <IDLE> in transaction
31354 | <IDLE>
27014 | <IDLE> in transaction
27015 | <IDLE> in transaction
26978 | <IDLE> in transaction
26985 | <IDLE> in transaction
27135 | select count(*) from ( select distinct on (email_id)
email_id,email,contact from email_bank a join (select email_id from
email_export_category where category_id in (1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
12, 14, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 1
12262 | SELECT source_id , cnt from (SELECT source_id,count(source_id) as
cnt from email_source group by source_id ) subsel join sources
using(source_id) order by source_id
27136 | <IDLE> in transaction
(16 rows)

tradein_clients=#
why does the above not match with the "top" output at
the same time:

==============================================================================
4:10pm up 2 days, 23:06, 2 users, load average: 6.21, 6.06, 5.60
69 processes: 66 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: 55.6% user, 2.0% system, 0.0% nice, 42.3% idle
Mem: 1028484K av, 980320K used, 48164K free, 0K shrd, 3744K buff
Swap: 971004K av, 102532K used, 868472K free 912724K
cached

PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
5456 postgres 17 0 59456 57M 57156 R 0 99.1 5.7 3:12 postmaster
6601 postgres 9 0 79964 77M 78328 S 0 3.3 7.7 0:01 postmaster
6779 postgres 9 0 88412 86M 86752 S 0 1.9 8.5 0:00 postmaster
6703 postgres 9 0 81668 79M 80276 S 0 1.7 7.9 0:01 postmaster
6943 postgres 9 0 78732 76M 77520 S 0 1.7 7.6 0:01 postmaster
6940 postgres 9 0 44180 42M 42668 S 0 0.5 4.2 0:00 postmaster
6776 postgres 9 0 121M 121M 119M S 0 0.3 12.0 0:01 postmaster
5597 postgres 8 0 624 248 216 S 0 0.0 0.0 0:24 postmaster
5598 postgres 9 0 1440 4 4 D 0 0.0 0.0 2:31 postmaster
5599 postgres 9 0 2052 4 4 S 0 0.0 0.0 28:05 postmaster
12262 postgres 9 0 88564 4 4 D 0 0.0 0.0 0:19 postmaster
13039 postgres 9 0 656 4 4 D 0 0.0 0.0 0:00 postmaster
29440 postgres 9 0 20928 19M 20332 S 0 0.0 1.9 0:01 postmaster
1652 postgres 9 0 3356 2324 2144 S 0 0.0 0.2 3:21 postmaster
2219 postgres 9 0 2744 2120 2068 S 0 0.0 0.2 0:00 postmaster
6772 postgres 9 0 100M 100M 99.3M S 0 0.0 9.9 0:00 postmaster
6805 postgres 9 0 4440 4168 3532 S 0 0.0 0.4 0:00 postmaster
6809 postgres 9 0 35280 34M 33948 S 0 0.0 3.4 0:00 postmaster
6846 postgres 9 0 98.9M 98M 99804 S 0 0.0 9.8 0:01 postmaster
6931 postgres 9 0 21744 20M 20428 S 0 0.0 2.0 0:02 postmaster
6934 postgres 9 0 19020 18M 17868 S 0 0.0 1.8 0:00 postmaster
6941 postgres 9 0 63280 61M 61756 S 0 0.0 6.1 0:01 postmaster
================================================================================

[root(at)linux10320 root2]# kill -INT 27135
bash: kill: (27135) - No such pid
[root(at)linux10320 root2]#

and # kill -INT 12262 does not actually kills it ??

regds
mallah.

--
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

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