A low memory usage error indicates that much less memory is being used than is provided by the system. A typical case is running a job that uses a small amount of memory in one of the job queues that provides large memory nodes. The example below shows that large memory nodes were requested (lines 2 and 22), but the average memory usage was less than 1 percent (line 3). Given that only 5.125 gb were required, the job could easily have fit on a 32 gb node provided by the workq or checkpt queues. In this case, the load of 16 (lines 4, 17, and 23) indicates the CPU cores were fully occupied. User account information is shown in lines 30 to 39.
1) E132 - Low memory usage 2) Total physical memory per node: 258272mb 3) Average memory usage: 5125mb, 1% 4) Average CPU percent is: 1566% 5) Please try to better use CPU resources. 6) 7) Node statistics:: 8) Number of nodes: 1 9) Number of cores: 16 10) Total physical memory per node: 258272mb 11) Average memory usage per node: 5125mb, 1% 12) Average memory usage per core: 320mb 13) Average virtual memory usage per node: 5890mb 14) Average virtual memory usage per core: 368mb 15) Average CPU percent per node: 1566% 16) Average CPU percent per core: 97% 17) Average load per node: 16.09 18) Reverified average load per node: 16.10 19) Effective maximum load on a node: 16.10 20) 21) PBS_job=432161.mike3 user=flast allocation=hpc_alloc04 22) queue=bigmem total_load=16.09 cpu_hours=5.38 wall_hours=3.96 23) unused_nodes=0 total_nodes=1 ppn=16 avg_load=16.09 avg_cpu=1566% 24) avg_mem=5125mb avg_vmem=5890mb 25) top_proc=flast:mothur:mike438:355M:320M:0.1hr:100% 26) toppm=flast:mothur:mike438:410M:359M node_processes=18 27) avg_avail_mem=222946mb min_avail_mem=222946mb 28) reverified_avg_load=16.10 29) 30) Name: First Last 31) Mail: firstname.lastname@example.org 32) Affil: First Last 33) Category: validation:current:01/27/2014 34) Name: First Last 35) Mail: email@example.com 36) Affil: First Last 37) Category: validation:current:01/27/2014 38) Allocations: 39) hpc_alloc04,flast,50000.00,
Users may direct questions to firstname.lastname@example.org.