server space increasing very fast but transaction are very low

Hi all
 
My database server db01 is on linux environment and size of base folder increasing very fast unexpectedly(creating renamed files of 1 GB in base folder like 1667234568.10)
details as below
 
path of the table space/base file
 
/opt/appl/pgsql82/data/base/453447624/
 
[postgres(at)wcatlsatdb01 453447624]$ ls -ltrh 1662209326*
-rw-------  1 postgres postgres 1.0G Aug 27 06:32 1662209326
-rw-------  1 postgres postgres 1.0G Aug 30 02:16 1662209326.1
-rw-------  1 postgres postgres 1.0G Aug 30 17:39 1662209326.2
-rw-------  1 postgres postgres 1.0G Sep  1 05:42 1662209326.3
-rw-------  1 postgres postgres 1.0G Sep  2 09:28 1662209326.4
-rw-------  1 postgres postgres 1.0G Sep  4 10:08 1662209326.5
-rw-------  1 postgres postgres 1.0G Sep  6 02:17 1662209326.6
-rw-------  1 postgres postgres 1.0G Sep  8 03:43 1662209326.7
-rw-------  1 postgres postgres 1.0G Sep  8 08:16 1662209326.8
-rw-------  1 postgres postgres 1.0G Sep 10 10:53 1662209326.9
-rw-------  1 postgres postgres 1.0G Sep 11 04:59 1662209326.10
-rw-------  1 postgres postgres 1.0G Sep 13 05:22 1662209326.11
-rw-------  1 postgres postgres 1.0G Sep 15 01:43 1662209326.12
-rw-------  1 postgres postgres 1.0G Sep 16 08:32 1662209326.13
-rw-------  1 postgres postgres 1.0G Sep 17 14:30 1662209326.14
-rw-------  1 postgres postgres 1.0G Sep 19 07:24 1662209326.15
-rw-------  1 postgres postgres 1.0G Sep 21 02:55 1662209326.16
-rw-------  1 postgres postgres 1.0G Sep 22 09:59 1662209326.17
-rw-------  1 postgres postgres 1.0G Sep 23 06:22 1662209326.18
-rw-------  1 postgres postgres 1.0G Sep 25 08:42 1662209326.19
-rw-------  1 postgres postgres 1.0G Sep 26 04:13 1662209326.20
-rw-------  1 postgres postgres 1.0G Sep 29 03:58 1662209326.21
-rw-------  1 postgres postgres 1.0G Sep 29 08:06 1662209326.22
-rw-------  1 postgres postgres 1.0G Oct  2 02:23 1662209326.23
-rw-------  1 postgres postgres 1.0G Oct  2 06:45 1662209326.24
-rw-------  1 postgres postgres 1.0G Oct  5 03:17 1662209326.25
-rw-------  1 postgres postgres 1.0G Oct  5 14:39 1662209326.26
-rw-------  1 postgres postgres 1.0G Oct  7 08:46 1662209326.27
-rw-------  1 postgres postgres 1.0G Oct  8 18:24 1662209326.28
-rw-------  1 postgres postgres 1.0G Oct 10 08:24 1662209326.29
-rw-------  1 postgres postgres 1.0G Oct 12 03:24 1662209326.30
-rw-------  1 postgres postgres 1.0G Oct 14 02:31 1662209326.31
-rw-------  1 postgres postgres 1.0G Oct 16 02:36 1662209326.32
-rw-------  1 postgres postgres 1.0G Oct 17 02:37 1662209326.33
-rw-------  1 postgres postgres 1.0G Oct 19 02:37 1662209326.34
-rw-------  1 postgres postgres 1.0G Oct 20 04:45 1662209326.35
-rw-------  1 postgres postgres 1.0G Oct 22 02:37 1662209326.36
-rw-------  1 postgres postgres 1.0G Oct 23 02:37 1662209326.37
-rw-------  1 postgres postgres 1.0G Oct 25 02:38 1662209326.38
-rw-------  1 postgres postgres 1.0G Oct 26 02:40 1662209326.39
-rw-------  1 postgres postgres 1.0G Oct 28 02:40 1662209326.40
-rw-------  1 postgres postgres 1.0G Oct 29 02:39 1662209326.41
-rw-------  1 postgres postgres 1.0G Oct 31 05:11 1662209326.42
-rw-------  1 postgres postgres 1.0G Nov  1 02:43 1662209326.43
-rw-------  1 postgres postgres 1.0G Nov  3 03:31 1662209326.44
-rw-------  1 postgres postgres 1.0G Nov  4 03:18 1662209326.45
-rw-------  1 postgres postgres 1.0G Nov  6 02:37 1662209326.46
-rw-------  1 postgres postgres 1.0G Nov  6 02:38 1662209326.47
-rw-------  1 postgres postgres 249M Nov  6 02:39 1662209326.48
[postgres(at)wcatlsatdb01 453447624]$

what is significance of these files and how can i avoid it.can i delete these renamed files from base folder or any thing else. Please  help
 
with regards!

 
Brahma Prakash Tiwari
DBA
iBoss Tech Solutions
Sec-63 Noida
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The contents of this email, including the attachments, are PRIVILEGED AND CONFIDENTIAL to the intended recipient at the email address to which it has been addressed.
 

Get rid of Add-Ons in your email ID. Get yourname(at)rocketmail(dot)com(dot) Sign up now! http://in.promos.yahoo.com/address