AG: AllegroGraph operational questions

[alexskr]

List of Operational questions for AllegroGraph:

1. What does The number of free http workers is 0, keep-alive may not be honoured. and Creating http worker thread #xxx mean?

   [2022-08-25T21:05:21.196 p1819 http] Creating http worker thread #73
   [2022-08-25T21:05:21.892 p1819 http] Creating http worker thread #74
   [2022-08-25T21:05:29.598 p1819 http] Creating http worker thread #75
   [2022-08-25T21:05:31.356 p1819 http] Creating http worker thread #76
   [2022-08-25T21:05:31.357 p1819 http] Creating http worker thread #77
   [2022-08-25T21:05:31.357 p1819 http] Creating http worker thread #78
   [2022-08-25T21:05:31.357 p1819 http] Creating http worker thread #79
   [2022-08-25T21:05:31.437 p1819 http] Creating http worker thread #80
   [2022-08-25T21:05:31.488 p1819 http] Creating http worker thread #81
   [2022-08-25T21:05:33.058 p1819 http] Creating http worker thread #82
   [2022-08-25T21:05:33.198 p1819 http] Creating http worker thread #83
   [2022-08-25T21:05:33.202 p1819 http] Creating http worker thread #84
   [2022-08-25T21:05:33.203 p1819 http] Creating http worker thread #85
   [2022-08-25T21:05:33.203 p1819 http] Creating http worker thread #86
   [2022-08-25T21:05:45.592 p1819 http] The number of free http workers is 0, keep-alive may not be honoured.
   [2022-08-25T21:05:59.590 p1819 http] Creating http worker thread #87
   [2022-08-25T21:05:59.595 p1819 http] Creating http worker thread #88
   [2022-08-25T21:05:59.595 p1819 http] Creating http worker thread #89
   [2022-08-25T21:07:11.704 p1819 http] Creating http worker thread #90
   [2022-08-25T21:07:11.705 p1819 http] Creating http worker thread #91
   [2022-08-25T21:07:11.705 p1819 http] Creating http worker thread #92
   [2022-08-25T21:07:11.706 p1819 http] Creating http worker thread #93
   [2022-08-25T21:07:11.746 p1819 http] Creating http worker thread #94
   [2022-08-25T21:07:13.951 p1819 http] Creating http worker thread #95
   [2022-08-25T21:07:16.447 p1819 http] The number of free http workers is 0, keep-alive may not be honoured.
   [2022-08-25T21:07:51.494 p1819 http] Creating http worker thread #96

[alexskr]

2. Why sometimes disk usage reported in AllegroGraph webview drastically underreported compared to the disk usage according to OS? it can be 50% to 80% larger on disk

[alexskr]

3. Zombie graph deletion was disabled because of performance issues with 4store. We need to enable and test graph deletion with AG.