Hello All,

The project that I am working on embeds v8 in it. One of the users reported 
seeing the following trace in the log files.


2020-12-01T04:48:31.912-08:00 [INFO] "Starting Function for:" 
"config::sfdc::accounts" 
2020-12-01T04:48:31.912-08:00 [INFO] "Fetching list of:" "SFDC::accounts" 
2020-12-01T04:48:31.950-08:00 [INFO] "Fetching SFDC Objects: " "accounts" 
2020-12-01T04:54:27.535-08:00 [INFO] "Fetch SFDC (curl) response status:" 
200 "/ #Objects:" 22179 
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] <--- Last few GCs --->
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] [5463:0x7f2af005c020] 774469 ms: 
Mark-sweep 1110.6 (1264.9) -> 1110.6 (1210.4) MB, 497.6 / 0.0 ms (average 
mu = 0.778, current mu = 0.000) last resort GC in old space requested
2020-12-01T04:54:43.716-08:00 [INFO] [5463:0x7f2af005c020] 775228 ms: 
Mark-sweep 1110.6 (1210.4) -> 1110.6 (1196.9) MB, 758.3 / 0.0 ms (average 
mu = 0.616, current mu = 0.000) last resort GC in old space requested
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] <--- JS stacktrace --->
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] ==== JS stack trace 
=========================================
2020-12-01T04:54:43.716-08:00 [INFO] 
2020-12-01T04:54:43.716-08:00 [INFO] 0: ExitFrame [pc: 0x7f2b037168ae]
2020-12-01T04:54:43.716-08:00 [INFO] Security context: 0x32a0fa3096b9 
<JSObject>
2020-12-01T04:54:43.716-08:00 [INFO] 1: FetchObjects_SFDC(aka 
FetchObjects_SFDC) [0x32a0fa30ea89] [Data_Ingestion.js:324] 
[bytecode=0x4ef5172bd09 offset=348](this=0x125eac5825a1 
<undefined>,0x19c460402291 <Object map = 0x12664db89e61>)
2020-12-01T04:54:43.716-08:00 [INFO] 2: OnUpdate [0x32a0fa30e951] 
[Data_Ingestion.js:64] [bytecode=0x4ef5172b1e9 
offset=281](this=0x32a0fa30fd81 <JSGlobal Object>,0x19c460402291 <Object 
map ...
2020-12-01T04:54:43.716-08:00 [INFO]

I do not have much information on what the user was trying to do here. Can 
someone elaborate on when do we generally see GC traces like these?

Thanks  

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