.live.[root@dev136 httpd]# ../../usr/bin/ab -k -c 200 -n 400000 -H "Cookie: SESSIONID=testid" http://127.0.0.1/index.html
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 40000 requests
Completed 80000 requests
Completed 120000 requests
Completed 160000 requests
Completed 200000 requests
Completed 240000 requests
Completed 280000 requests
Completed 320000 requests
Completed 360000 requests
Completed 400000 requests
Finished 400000 requests


Server Software:        Apache/2.4.6
Server Hostname:        127.0.0.1
Server Port:            80

Document Path:          /index.html
Document Length:        0 bytes

Concurrency Level:      200
Time taken for tests:   157.375 seconds
Complete requests:      400000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    396155
Total transferred:      118227018 bytes
HTML transferred:       0 bytes
Requests per second:    2541.70 [#/sec] (mean)
Time per request:       78.688 [ms] (mean)
Time per request:       0.393 [ms] (mean, across all concurrent requests)
Transfer rate:          733.64 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.3      0      24
Processing:     1   79  56.1     73    2034
Waiting:        1   78  55.3     73    2034
Total:          1   79  56.1     73    2034

Percentage of the requests served within a certain time (ms)
  50%     73
  66%     89
  75%    100
  80%    107
  90%    128
  95%    148
  98%    176
  99%    201
 100%   2034 (longest request)
.live.[root@dev136 httpd]# tail tail -50 logs/access_log 
tail: option used in invalid context -- 5
.live.[root@dev136 httpd]# tail -50 logs/access_log 
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 16579
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 6229
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 9159
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 10159
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 19067
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 58645
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 44922
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 31207
[23/May/2017:11:49:41 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 1937
[23/May/2017:11:49:42 -0400] "GET /index.html HTTP/1.0" 200 - testid Time Taken: 1067

.live.[root@dev136 httpd]# grep "Garbage collection took" logs/modsec_debug.log |tail -50
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 40583 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea0970][/index.html][4] Garbage collection took 6625 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 16851 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 13996 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 23249 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 14435 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 26385 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 22963 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 17111 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 95494 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 10744 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 20155 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 11977 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 11020 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 15564 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 14258 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea0970][/index.html][4] Garbage collection took 93411 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 30912 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 42033 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 26862 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 33128 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 23606 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea4990][/index.html][4] Garbage collection took 19944 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 29776 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 21512 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 24983 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 65477 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea69a0][/index.html][4] Garbage collection took 53509 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 29981 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea0970][/index.html][4] Garbage collection took 63792 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e90820][/index.html][4] Garbage collection took 107674 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 46040 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 53119 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 44266 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 45680 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 56126 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 69153 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 38079 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 56938 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 36604 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 82936 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e8e810][/index.html][4] Garbage collection took 70273 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 44385 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475e9c950][/index.html][4] Garbage collection took 48412 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea4990][/index.html][4] Garbage collection took 57384 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea0970][/index.html][4] Garbage collection took 56097 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 62891 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea89b0][/index.html][4] Garbage collection took 65795 microseconds.
[23/May/2017:11:47:02 --0400] [127.0.0.1/sid#7f9475dc7340][rid#7f9475ea2980][/index.html][4] Garbage collection took 111885 microseconds.
[23/May/2017:11:49:54 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea89b0][*][4] Garbage collection took 39 microseconds.
.live.[root@dev136 httpd]# grep 'collection_store: Wrote variable: name "my_counter", value "' logs/modsec_debug.log |tail
[23/May/2017:11:51:24 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea2980][*][9] collection_store: Wrote variable: name "my_counter", value "528217".
[23/May/2017:11:51:25 --0400] [localhost/sid#7f9475dc7340][rid#7f9475e90820][*][9] collection_store: Wrote variable: name "my_counter", value "528218".
[23/May/2017:11:51:26 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea89b0][*][9] collection_store: Wrote variable: name "my_counter", value "528219".
[23/May/2017:11:51:27 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea69a0][*][9] collection_store: Wrote variable: name "my_counter", value "528220".
[23/May/2017:11:51:28 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea89b0][*][9] collection_store: Wrote variable: name "my_counter", value "528221".
[23/May/2017:11:51:29 --0400] [localhost/sid#7f9475dc7340][rid#7f9475e9c950][*][9] collection_store: Wrote variable: name "my_counter", value "528222".
[23/May/2017:11:51:30 --0400] [localhost/sid#7f9475dc7340][rid#7f9475e8e810][*][9] collection_store: Wrote variable: name "my_counter", value "528223".
[23/May/2017:11:51:31 --0400] [localhost/sid#7f9475dc7340][rid#7f9475e90820][*][9] collection_store: Wrote variable: name "my_counter", value "528224".
[23/May/2017:11:51:32 --0400] [localhost/sid#7f9475dc7340][rid#7f9475e8e810][*][9] collection_store: Wrote variable: name "my_counter", value "528225".
[23/May/2017:11:51:33 --0400] [localhost/sid#7f9475dc7340][rid#7f9475ea69a0][*][9] collection_store: Wrote variable: name "my_counter", value "528226".