Hello,

Is there a way to limit the number of  "page cached" on a SLES8 system
without limiting the size of the guest ?
I want to reserve a large number of free memory pages for the
application.
Have a look to the allocation please:
In the morning,
   procs                      memory              swap          io
system         cpu
 r  b  w   swpd   free   buff      cache   si  so    bi    bo   in    cs
us  sy  id
 0  0  1      0 407880  17296 191360   0   0     8     4    0    58   2
0  98
 1  0  0      0 410132  17320 191760   0   0     0    22    0   305   8
2  90
 1  0  1      0 409560  17352 192440   0   0     6    17    0   319   6
2  92
 0  0  1      0 406008  17360 192940   0   0     3    17    0   297   7
2  91
 1  0  0      0 408220  17372 193504   0   0     5    17    0   248   7
1  92
 0  0  1      0 407056  17384 193900   0   0     0    15    0   311   9
2  89
 0  0  1      0 401012  17400 194512   0   0     0    19    0   452  12
2  86
 0  0  1      0 402420  17412 194976   0   0     0    17    0   308  12
2  86
 1  0  0      0 399020  17420 194548   0   0     3    21    0   395  11
2  86
 0  0  0      0 396060  17424 195000   0   0     0    17    0   403  10
2  88
 1  0  0      0 404200  17432 195360   0   0     0    19    0   312   8
2  90
 1  0  0      0 397712  17444 195828   0   0     0    13    0   394  10
2  88
 0  0  0      0 400108  17456 196248   0   0     0    21    0   370   7
2  91
 3  0  1      0 400468  17532 197124   0   0     8    19    0   332  10
2  89
 1  0  0      0 383604  17804 202784   0   0    90    23    0   426  14
2  84
 0  0  1      0 388692  17836 204224   0   0    17    23    0   450   9
2  89
 0  0  1      0 383816  17900 205768   0   0    17    21    0   440  12
3  86
 0  0  0      0 389004  17920 206412   0   0     4    23    0   366   8
2  90
 0  0  0      0 383012  17928 206900   0   0     0    19    0   424  10
2  88
..
...
in the evening,
 2  0  0      0 123940  23888 447436   0   0     0    36    0   464  38
4  58
 0  0  0      0 130812  23920 448940   0   0    16    32    0   503  41
4  55
 2  0  1      0 129868  23936 449484   0   0     0    20    0   443  14
3  84
 6  0  0      0 108252  23956 450172   0   0     0    27    0   524  15
3  82
 3  0  1      0  89744  23972 450800   0   0     0    22    0   525  13
3  84
 2  0  1      0  82496  24000 451636   0   0     0    24    0   555  34
4  62
 1  0  1      0  84892  24012 451432   0   0     0    31    0   634  18
4  78
 4  0  0      0  80232  24028 452252   0   0     0    22    0   668  16
3  81
 1  0  2      0  82200  24040 453028   0   0     0    26    0   574  20
3  76
 0  0  1      0  81536  24052 453856   0   0     0    24    0   621  17
3  80
 0  0  1      0  83396  24060 454448   0   0     0    24    0   512  14
3  83
 0  0  1      0  84584  24076 454864   0   0     0    20    0   385  11
2  87
 1  0  1      0  63404  24088 455428   0   0     0    18    0   683  12
2  85
 1  0  0      0  50252  24108 456164   0   0     0    26    0   590  17
3  79
 0  0  1      0  46016  24128 456820   0   0     0    22    0   479  12
3  86
 2  0  1      0  47052  24144 456688   0   0     0    27    0   621  16
3  81
 0  0  0      0  44228  24160 457324   0   0     0    26    0   501  11
2  86
 3  0  1      0  47480  24172 458020   0   0     0    22    0   506  11
3  87
 1  0  1      0  44656  24188 458660   0   0     0    22    0   495  14
3  83
 0  0  0      0  40288  24204 459416   0   0     0    24    0   536  15
3  82
 1  0  0      0  40036  24216 460192   0   0     0    26    0   574  15
3  82

all free memory is kept by cache.
When memory problem occurs, only few pages are freed. What parameter
should I set to limit the number of page cache ?

Thanks in advance.


   Gerard MONTELEONE
  Ingenieur Systeme & Reseau
SI.TE.C Z.I du vazzio 20090 AJACCIO
* +33495236809 * +33687727032
              www.sitec.fr <http://www.sitec.fr/>


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