vManager Failed: Unexpected error ( Out of memory )

When I run following command to collect coverage  (There are 2000  vsof files)

emanager -coverage -vsof " ./covwork/irun/*/*.vsof " &

I got the Error: vManager Failed: Unexpected error

The reason is Out of memory .

When I run coverage follow. I always get 2 problems:

(1) vManager Failed: Unexpected error   ( Out of memory )

(2) If no error, it is very slow and will consume much of memory.

How to solve upper problems.

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Here are more log info:

Reading EManager configuration...
 

Doing EManager setup...
 

On-the-fly GC, current size is 2569369600 bytes (including 323404 known free)

Done - total size of reachable data is 79912192 bytes (plus 2467005536 free).
 

On-the-fly GC, current size is 3124511600 bytes (including 547645728 known free)

Done - total size of reachable data is 83085120 bytes (plus 3022911368 free).
 

On-the-fly GC, current size is 3198727704 bytes (including 628465380 known free)

Done - total size of reachable data is 85586128 bytes (plus 3093959788 free).
 

On-the-fly GC, current size is 3254023348 bytes (including 683430808 known free)

Done - total size of reachable data is 87813604 bytes (plus 3147439360 free).
 

Memory accounting is not enabled. Set the environment variable SPECMAN_MEMORY_ACCOUNTING to enable it
 

configuration options for: memory

        -automatic_gc_settings         =      STANDARD

        -optimal_process_size          =      3154116608

        -notify_gc_settings            =      FALSE

        -gc_threshold                  =   1393665248

        -gc_increment                  =  0

        -print_msg                     =  TRUE

        -print_otf_msg                 =   TRUE

        -retain_printed_structs        = TRUE

        -retain_trace_structs          = FALSE

        -max_retained_structs          =      0

        -disable_disk_based_gc         =     FALSE

        -max_size                      = 4273995775

        -absolute_max_size             =    4294967295

        -check_consistency             =    FALSE

        -print_debug_msgs              =   FALSE

        -expand_stack                  =   0
 

Please see chapter 'Specman Memory Consumption Is Too High' in the Specman documentation
 

**** Fatal error - leaving vManager:

Out of memory

vManager failed: Unexpected error