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Swap completely used with memory free

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Operating Systems Solaris Swap completely used with memory free
# 1  
Old 02-17-2016
Oracle Swap completely used with memory free
I have a Solaris 10 VM that processes are seg faulting on (no space) and swap goes from 64GB to 151MB which triggers the seg fault. The free memory is 25GB when this occurs. I have adjusted the project to use all available ram. My question is why is swap being filled with 25GB remaining?
the project is default.
# 2  
Old 02-18-2016
Hi,

What type of machine is the VM host, what is the host OS and what is the VM OS.

Gull04
# 3  
Old 02-18-2016
There is free memory (RAM) because the applications haven't write anything in it.

There is no more swap (assuming you are looking at "swap -s" output), because the applications have malloc'ed something like 80 GB or so and there is no more virtual memory to satisfy new allocations.

The processes are segfaulting because they do not check malloc return value.
# 4  
Old 02-18-2016
the VM is running on Vmware 5.5, the OS is Solaris 10 64-bit. this is a threading app that spawns 5 children per report process (so at a given time there are 20 children). Thanks for the replies on this so far. any additional settings in the OS that I should look at?
# 5  
Old 02-18-2016
You should state how much RAM is allocated to the VM, if you have capped the ZFS ARC (if ZFS is used), what commands you run to identify the RAM and swap usage and their output.
# 6  
Old 02-18-2016
RAM is 64GB allocated to the VM swap is 32GB
it is UFS arch
i am running vmstat while processing the reports. so vmstat 1 or vmstat -S 1
# 7  
Old 02-18-2016
You might just simply need to increase the swap area size from 32GB to 64 or 128GB.
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