malloc returning NULL if freemem high & swapmem low

UNIX Solaris
1

Hi All,

In my application malloc is returning NULL even though there is sufficient amount of free memory is available but swap memory is low.

Is this possible that, if free memory is high & swap memory is low, malloc will not be able to allocate memory & return NULL ?:slight_smile:

Kindly look into the issue as I am not able to start my application in the above mentioned condition.

Regards & Thanks,
Ritesh

2

Is your system running on a x86 platform? what processor or h/w? solaris version? output your OS level and current kernel patch level as well. Thx

3

Also, show what commands you use to measure free memory and swap and their output.

4

Hi All,

Please find the details asked by you:

      Is my system running on a x86 platform?  Yes..

� what processor or h/w? 2 Pentium III processors
� MPRAS version? 3.03 (As I am using MPRAS not solaris)
� output of OS level and current kernel patch level 03.03.02.15

       Commands I used to measure free memory and swap :

       [ app001-0 root:/ ] sar -r 1 10

app001-0 app001-0 4.2 3.3 SDS2 06/03/08

06:56:32 freemem freeswp
06:56:33 513222 10197
06:56:34 513205 10197
06:56:35 513210 10197
06:56:36 513210 10197
06:56:37 513231 10197
06:56:38 513271 10197
06:56:39 513271 10197
06:56:40 513268 10197
06:56:41 513258 10197
06:56:42 513258 10197

Thanks & Regards,
Ritesh

5

Hi All,

Please look into the above mentioned issue I am facing as this is very urgent for me.If any further detail required plz let me know

Regards & Thanks,
Ritesh

6

Not sure if the Solaris specific forum is the best choice for non Solaris related questions ...

Anyway, is your OS supporting the vmstat command ?