I believe I might have made a reference to this before. What we are seeing since Centos 7 where there is sporadic high load average without any load.
On that server, CPU is at 60% with no load. Context switches are high. This only occurs when trafficserver is started. Is there anything we can look into that would reduce the occurrence of these high load averages? Load averages are going down as we put more load on the server. [image: image.png] # dstat You did not select any stats, using -cdngy by default. ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 0 0 100 0 0 0| 0 0 |1084B 19k| 0 0 | 384 640 0 0 100 0 0 0| 0 0 | 312B 711B| 0 0 | 267 524 0 0 100 0 0 0| 0 0 | 172B 492B| 0 0 | 727 727 0 0 100 0 0 0| 0 16k|5474B 6196B| 0 0 | 814 1081 0 0 100 0 0 0| 0 0 | 160B 432B| 0 0 | 314 627 0 0 100 0 0 0| 0 0 | 218B 995B| 0 0 | 292 615 0 0 100 0 0 0| 0 0 |1000B 934B| 0 0 | 281 566 0 0 99 0 0 0| 0 0 |5468B 3528B| 0 0 |1638 2375 0 0 99 0 0 0| 0 36k| 13k 143k| 0 0 |1867 2099 0 0 100 0 0 0| 0 0 |2176B 1656B| 0 0 | 330 634 0 0 99 0 0 0| 0 0 | 830B 1030B| 0 0 | 921 1183 0 0 100 0 0 0| 0 0 | 656B 4378B| 0 0 | 382 654 0 0 100 0 0 0| 0 0 | 524B 576B| 0 0 | 344 646 1 3 93 3 0 0| 422M 14M| 722B 51k| 0 0 | 21k 68k <- Started Traffic Server 0 3 71 25 0 0|4612M 0 |1190B 14k| 0 0 | 47k 55k 2 1 89 8 0 0| 676M 0 | 86B 378B| 0 0 | 31k 55k 3 0 96 0 0 0| 0 0 |1060B 41k| 0 0 | 29k 56k 4 1 96 0 0 0| 0 132k|8202B 32k| 0 0 | 30k 58k 2 1 98 0 0 0| 0 20k| 794B 7699B| 0 0 | 29k 57k 0 1 99 0 0 0| 0 8192B|1897B 82k| 0 0 | 28k 56k 0 1 99 0 0 0| 0 8192B| 419B 3403B| 0 0 | 27k 56k 0 1 99 0 0 0| 0 0 |6816B 139k| 0 0 | 26k 55k 0 1 99 0 0 0| 0 0 | 390B 1199B| 0 0 | 24k 54k 0 1 98 0 0 0| 0 20k| 152B 529B| 0 0 | 13k 43k 0 1 99 0 0 0| 0 0 |1216B 42k| 0 0 |8804 37k 0 1 99 0 0 0| 0 80k| 152B 548B| 0 0 |7260 35k 0 1 98 0 0 0| 0 0 | 390B 1207B| 0 0 |7865 35k 1 1 98 0 0 0| 0 128k|1342B 81k| 0 0 |8983 39k 0 1 98 0 0 0| 0 0 |8313B 15k| 0 0 | 10k 39k 0 1 99 0 0 0| 0 0 | 390B 1200B| 0 0 |9012 40k 0 1 99 0 0 0| 0 80k|3252B 134k| 0 0 |8184 37k 0 1 99 0 0 0| 0 0 |1440B 62k| 0 0 |8425 38k 0 1 99 0 0 0| 0 0 | 390B 1199B| 0 0 |7550 35k 1 1 98 0 0 0| 0 0 | 86B 370B| 0 0 |8011 36k 0 1 98 0 0 0| 0 100k|1216B 42k| 0 0 |8225 37k 0 1 99 0 0 0| 0 80k| 714B 41k| 0 0 |7922 37k 0 1 99 0 0 0| 0 0 | 86B 378B| 0 0 |8075 36k^C
