FSCT results shows available physical memory in negative even though memory is available

Question

I ran the FSCT 1.2. In the result summary , I am seeing the Available physical memory in negative value. Then in the server resources there is available memory. So what the negative value indicates ? 
*** Results
Users  Overload  Throughput  Errors  Errors [%]  Duration [ms]
8600         0%         790       4          0%         720193
8800         0%         809       4          0%         720068
9000         0%         828       6          0%         720708
*** Server's information
OS name: Microsoft Windows Storage Server 2012 Standard|C:\Windows|\Device\Harddisk25\Partition2
System drive: C:
Free physical memory: -674414456KB      What is this mean ?????
*** Performance Counters
1 - \Processor(_Total)\% Processor Time
2 - \PhysicalDisk(_Total)\Disk Write Bytes/sec
3 - \PhysicalDisk(_Total)\Disk Read Bytes/sec
4 - \Memory\Available Mbytes
*** Server resources
Users    CPU     DiskWrite      DiskRead        Memory       avg( 5)       avg( 6)       avg( 7)       avg( 8)       avg( 9)  
    avg(10)       avg(11)       avg(12)       avg(13)       avg(14)       avg(15)       avg(16)
 8000  26.1%    54817672.0    70764376.0       35565.0          23.2           2.9       29980.6       40536.0      
    9.1           2.5       37781.1       72017.9        2082.9         824.6           0.0          
0.0  
 8200  40.3%    91722760.0   112079968.0       39282.9          37.2           3.1       78341.7       46828.1        
 14.9           1.0       45422.1      114833.9        2443.1        1152.5           0.0           0.0  
 8400  41.6%   101653792.0   116234328.0       39255.1          39.0           2.6       82509.6       40046.2          15.9
          3.5       46201.1      135730.3        2467.5        1163.0           0.0           0.0  
 8600  45.3%   105905328.0   123740152.0       39334.5          42.3           3.0       88674.5       45664.4          18.2
          6.5       46254.3      137580.1        2621.2        1192.5           0.0           0.0  
 8800  41.5%   106930768.0   127199024.0       39064.6          40.8           0.7       85493.2       16726.3          19.4
         47.6       46109.0      209028.9        2685.0        1058.9           0.0           0.0  
 9000  42.5%   110077368.0   129239064.0       38902.4          41.9           0.6       85582.4       17756.1          19.7
         61.1       46034.7      198579.7       
In the above server resources, memory is still available. How it is calculated and why it is in negative value. 
The same test if i repeat i see a positive value. This tool gives everytime + and - ve value which is unreliable

Answer 1

Hi,
Here are some useful links which should help you from the performance point of view:
Transaction tuning: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/am_misc/tune.html
Access method tuning: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/am_misc/tune.html
Degrees of isolation: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/transapp/read.html
Checkpoints: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/transapp/checkpoint.html
Selecting a cache size: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/am_conf/cachesize.html
Transaction throughput: http://www.oracle.com/technology/documentation/berkeley-db/db/ref/transapp/throughput.html
Also, the Berkeley DB FAQ are having a performance section: http://www.oracle.com/technology/products/berkeley-db/faq/db_faq.html
Regards,
Bogdan Coman