SIGE recomputing resizedimages for unknown reason

As seen from the frontend the menu containing the article with the gallery/ies opens extremely and unexpectedly slow.
Inspecting the creation dates of files in resizedimages I found that these have been recomputed without any change to the article and the images in the library.
Looking at the thumbnails of the same image library I can see that these were created adequate time ago and are apparently reused. Resized images are crated long after last change on the server. Moreover I can observe that this recomputation is also triggered again by what ??? Could it be that a client with a different browser/screen triggers the recomputation?


Artikel xKeltenwelt zuletzt bearbeitet 2012-08-18 19:01:23, Bilder wurden sukzessive in das image Verzeichnis eingestellt, letzter Zugang 20:54
{gallery}xKeltenwelt,width=200,height=200,gap_v=10,gap_h=10,thumbs=1,resize_images=1,width_image=600,height_image=600,ratio_image=1,images_new=1{/gallery}

hhlux2:/srv/www/htdocs/Joomla_hh/images # ls -ld xK*
drwxr-xr-x 4 wwwrun www 4096 Aug 18 20:54 xKeltenwelt
hhlux2:/srv/www/htdocs/Joomla_hh/images # ls -lR xK*
xKeltenwelt:
total 10520
-rw-r--r-- 1 wwwrun www 1039189 Aug 18 19:48 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 root root 1004588 Aug 18 20:52 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 root root 1020079 Aug 18 20:52 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 1004250 Aug 18 19:48 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 1011184 Aug 18 19:48 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 root root 1023863 Aug 18 20:52 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 root root 1019084 Aug 18 20:52 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 1003028 Aug 18 19:48 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 root root 1019648 Aug 18 20:52 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 root root 1024599 Aug 18 20:52 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 524010 Aug 15 16:59 img_3530.jpg
-rw-r--r-- 1 wwwrun www 47 Aug 15 16:56 index.html
-rw-r--r-- 1 wwwrun www 36854 Aug 15 16:58 masten.jpg
drwxrwxrwx 2 wwwrun www 4096 Aug 18 20:54 resizedimages
-rw-r--r-- 1 wwwrun www 105 Aug 18 20:53 sige_turbo_css-de-DE.txt
-rw-r--r-- 1 wwwrun www 5521 Aug 18 20:54 sige_turbo_html-de-DE.txt
drwxrwxrwx 2 wwwrun www 4096 Aug 18 20:54 thumbs

xKeltenwelt/resizedimages:
total 548
-rw-r--r-- 1 wwwrun www 47197 Aug 18 21:56 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 wwwrun www 50719 Aug 18 21:56 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 wwwrun www 48607 Aug 18 21:56 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 37600 Aug 18 21:56 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 51532 Aug 18 21:56 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 wwwrun www 46740 Aug 18 21:57 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 wwwrun www 43402 Aug 18 21:57 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 41292 Aug 18 21:57 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 wwwrun www 41606 Aug 18 21:57 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 wwwrun www 39708 Aug 18 21:57 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 50820 Aug 18 21:57 img_3530.jpg
-rw-r--r-- 1 wwwrun www 0 Aug 16 18:04 index.html
-rw-r--r-- 1 wwwrun www 34511 Aug 18 21:57 masten.jpg

xKeltenwelt/thumbs:
total 112
-rw-r--r-- 1 wwwrun www 8042 Aug 18 19:57 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 wwwrun www 9677 Aug 18 20:54 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 wwwrun www 7711 Aug 18 20:54 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 6127 Aug 18 19:57 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 8833 Aug 18 19:57 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 wwwrun www 8298 Aug 18 20:54 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 wwwrun www 7133 Aug 18 20:54 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 7680 Aug 18 19:57 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 wwwrun www 6711 Aug 18 20:54 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 wwwrun www 5233 Aug 18 20:54 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 9245 Aug 16 22:50 img_3530.jpg
-rw-r--r-- 1 wwwrun www 0 Aug 16 16:55 index.html
-rw-r--r-- 1 wwwrun www 5842 Aug 16 22:50 masten.jpg
hhlux2:/srv/www/htdocs/Joomla_hh/images #

=========== some time later - without changes to the server:
hhlux2:/srv/www/htdocs/Joomla_hh/images # ls -lR xK*
xKeltenwelt:
total 10520
-rw-r--r-- 1 wwwrun www 1039189 Aug 18 19:48 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 root root 1004588 Aug 18 20:52 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 root root 1020079 Aug 18 20:52 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 1004250 Aug 18 19:48 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 1011184 Aug 18 19:48 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 root root 1023863 Aug 18 20:52 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 root root 1019084 Aug 18 20:52 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 1003028 Aug 18 19:48 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 root root 1019648 Aug 18 20:52 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 root root 1024599 Aug 18 20:52 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 524010 Aug 15 16:59 img_3530.jpg
-rw-r--r-- 1 wwwrun www 47 Aug 15 16:56 index.html
-rw-r--r-- 1 wwwrun www 36854 Aug 15 16:58 masten.jpg
drwxrwxrwx 2 wwwrun www 4096 Aug 18 20:54 resizedimages
-rw-r--r-- 1 wwwrun www 105 Aug 18 20:53 sige_turbo_css-de-DE.txt
-rw-r--r-- 1 wwwrun www 5521 Aug 18 20:54 sige_turbo_html-de-DE.txt
drwxrwxrwx 2 wwwrun www 4096 Aug 18 20:54 thumbs

xKeltenwelt/resizedimages:
total 548
-rw-r--r-- 1 wwwrun www 47197 Aug 18 22:17 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 wwwrun www 50719 Aug 18 22:17 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 wwwrun www 48607 Aug 18 22:17 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 37600 Aug 18 22:17 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 51532 Aug 18 22:17 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 wwwrun www 46740 Aug 18 22:17 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 wwwrun www 43402 Aug 18 22:17 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 41292 Aug 18 22:17 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 wwwrun www 41606 Aug 18 22:17 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 wwwrun www 39708 Aug 18 22:17 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 50820 Aug 18 22:17 img_3530.jpg
-rw-r--r-- 1 wwwrun www 0 Aug 16 18:04 index.html
-rw-r--r-- 1 wwwrun www 34511 Aug 18 22:17 masten.jpg

xKeltenwelt/thumbs:
total 112
-rw-r--r-- 1 wwwrun www 8042 Aug 18 19:57 20120701_1061943640_pict0043.jpg
-rw-r--r-- 1 wwwrun www 9677 Aug 18 20:54 20120701_1173800316_pict0059.jpg
-rw-r--r-- 1 wwwrun www 7711 Aug 18 20:54 20120701_1327749286_pict0053.jpg
-rw-r--r-- 1 wwwrun www 6127 Aug 18 19:57 20120701_1458474470_pict0049.jpg
-rw-r--r-- 1 wwwrun www 8833 Aug 18 19:57 20120701_1479469265_pict0040.jpg
-rw-r--r-- 1 wwwrun www 8298 Aug 18 20:54 20120701_1587139269_pict0050.jpg
-rw-r--r-- 1 wwwrun www 7133 Aug 18 20:54 20120701_1610810282_pict0055.jpg
-rw-r--r-- 1 wwwrun www 7680 Aug 18 19:57 20120701_1625040380_pict0048.jpg
-rw-r--r-- 1 wwwrun www 6711 Aug 18 20:54 20120701_1690888218_pict0052.jpg
-rw-r--r-- 1 wwwrun www 5233 Aug 18 20:54 20120701_1851746398_pict0057.jpg
-rw-r--r-- 1 wwwrun www 9245 Aug 16 22:50 img_3530.jpg
-rw-r--r-- 1 wwwrun www 0 Aug 16 16:55 index.html
-rw-r--r-- 1 wwwrun www 5842 Aug 16 22:50 masten.jpg
hhlux2:/srv/www/htdocs/Joomla_hh/images #