mysql-stress-test.pl, README.stress:

  Revise stress-test README


mysql-test/README.stress:
  Revise stress-test README
mysql-test/mysql-stress-test.pl:
  Revise stress-test README

mysql-test/README.stress

@@ -2,114 +2,118 @@
 Overview
 --------
 
-Stress script is designed to perform testsing of mysql server in 
-multi-thread environment. 
-
-Stress script allows:
- 
- - to use for stress testing mysqltest binary as test engine
- - to use for stress testing both regular test suite and any
-   additional test suites (e.g. mysql-test-extra-5.0)
- - to specify files with lists of tests both for initialization of
-   stress db and for further testing itself
- - to define number of threads that will be concurrently used in testing
- - to define limitations for test run. e.g. number of tests or loops
-   for execution or duration of testing, delay between test executions, etc.
- - to get readable log file which can be used for identification of
-   errors arose during testing
-
-All functionality regarding stress testing was implemeted in 
-mysql-stress-test.pl script and there are two ways to run stress test:
-
- - for most cases it is enough to use options below for starting of
-   stress test from mysql-test-run wrapper. In this case server will 
-   be run automatically, all preparation steps will be performed
-   and after that stress test will be started.
-
- - in advanced case one can run mysql-stress-test.pl script directly. 
-   But it requires to perform some preparation steps and to specify a 
-   bunch of options as well so this way may look a bit complicate.
+The stress script is designed to perform testing of the MySQL server in 
+a multi-threaded environment. 
+
+All functionality regarding stress testing is implemented in the
+mysql-stress-test.pl script.
+
+The stress script allows:
+ 
+ - To stress test the mysqltest binary test engine.
+ - To stress test the regular test suite and any additional test suites
+   (such as mysql-test-extra-5.0).
+ - To specify files with lists of tests both for initialization of
+   stress db and for further testing itself.
+ - To define the number of threads to be concurrently used in testing.
+ - To define limitations for the test run. such as the number of tests or
+   loops for execution or duration of testing, delay between test
+   executions, and so forth.
+ - To get a readable log file that can be used for identification of
+   errors that occur during testing.
+
+There are two ways to run the mysql-stress-test.pl script:
+
+ - For most cases, it is enough to use the options below for starting
+   the stress test from the mysql-test-run wrapper. In this case, the
+   server is run automatically, all preparation steps are performed,
+   and after that the stress test is started.
+
+ - In advanced case, you can run the mysql-stress-test.pl script directly. 
+   But this requires that you perform some preparation steps and to specify
+   a bunch of options as well, so this invocation method may be a bit
+   complicated.
 
 Usage
 -----
 
-Below is list of stress test specific options for mysql-test-run:
+The following mysql-test-run options are specific to stress-testing:
 
 --stress 
   Enable stress mode
 
 --stress-suite=<suite name>
-  Test suite name that will be used in stress testing.
-  We assume that all suites are located in mysql-test/suite directory
+  Test suite name to use in stress testing.  We assume that all suites
+  are located in the mysql-test/suite directory.
   There is one special suite name - <main|default> that corresponds
-  to regular test suite located in mysql-test directory. 
+  to the regular test suite located in the mysql-test directory. 
   
 --stress-threads=<number of threads>
-  Number of threads that will be used in stress testing
+  The number of threads to use in stress testing.
   
 --stress-tests-file=<filename with list of tests>
-  Filename with list of tests(without .test suffix) that will be used in 
-  stress testing. Default filename is stress_tests.txt and default 
+  The file that contains the list of tests (without .test suffix) to use in 
+  stress testing. The default filename is stress_tests.txt and the default 
   location of this file is suite/<suite name>/stress_tests.txt
 
 --stress-init-file=<filename with list of tests>
-  Filename with list of tests(without .test suffix) that will be used in 
-  stress testing for initialization of stress db. These tests will be 
-  executed only once before starting of test itself. Default filename 
-  is stress_init.txt and default location of this file is 
+  The file that contains list of tests (without .test suffix) to use in 
+  stress testing for initialization of the stress db. These tests will be 
+  executed only once before starting the test itself. The default filename 
+  is stress_init.txt and the default location of this file is 
   suite/<suite name>/stress_init.txt
 
 --stress-mode=<method which will be used for choosing tests from the list>
   Possible values are: random(default), seq 
 
-  There are two possible modes which affect order of selecting of tests
+  There are two possible modes that affect the order of test selection
   from the list:
-    - in random mode tests will be selected in random order
-    - in seq mode each thread will execute tests in the loop one by one as
-      they specified in the list file.
+    - In random mode, tests are selected in random order
+    - In seq mode, each thread executes tests in a loop one by one in
+	  the order specified in the list file.
 
---stress-test-count= <number>
+--stress-test-count=<number>
   Total number of tests that will be executed concurrently by all threads
 
---stress-loop-count= <number>
+--stress-loop-count=<number>
   Total number of loops in seq mode that will be executed concurrently 
   by all threads
 
---stress-test-duration= <number>
+--stress-test-duration=<number>
   Duration of stress testing in seconds
 
 Examples
 -------- 
 
-1. Example of simple command line to start stress test:
+1. Example of a simple command line to start a stress test:
 
  mysql-test-run --stress alias
 
-Runs stress test with default values for number of threads and number of tests,
-with test 'alias' from suite 'main'.
+Runs a stress test with default values for number of threads and number
+of tests, with test 'alias' from suite 'main'.
 
 2. Using in stress testing tests from other suites:
 
  - mysql-test-run --stress --stress-threads=10 --stress-test-count=1000 \
                  --stress-suite=example  --stress-tests-file=testslist.txt
 
-   Will run stress test with 10 threads, will execute 1000 tests by all 
-   threads, test will be used from suite 'example', list of test will be 
+   Runs a stress test with 10 threads, executes 1000 tests by all 
+   threads, tests are used from suite 'example', the list of tests is
    taken from file 'testslist.txt'
 
  - mysql-test-run --stress --stress-threads=10 --stress-test-count=1000 \
                   --stress-suite=example sum_distinct
 
-   Will run stress test with 10 threads, will execute 1000 tests by all 
-   threads, test will be used from suite 'example', list of test contains 
-   only one test 'sum_distinct'
+   Runs stress test with 10 threads, executes 1000 tests by all 
+   threads, tests are used from suite 'example', the list of tests
+   contains only one test 'sum_distinct'
 
 3. Debugging of issues found with stress test
 
- Right now stress test is not fully integrated in mysql-test-run
- and does not support --gdb option so to debug issue found with stress 
- test you have to start separately mysql server under debuger and then 
- run stress test as:
+ Right now, the stress test is not fully integrated in mysql-test-run
+ and does not support the --gdb option. To debug issues found with the
+ stress test, you must start the MySQL server separately under a debugger
+ and then run the stress test like this:
  
  - mysql-test-run --extern --stress --stress-threads=10 \
                   --stress-test-count=1000 --stress-suite=example \

mysql-test/mysql-stress-test.pl

@@ -14,16 +14,17 @@
 # 
 # Design of stress script should allow one:
 # 
-#   - to use for stress testing mysqltest binary as test engine
-#   - to use for stress testing both regular test suite and any
-#     additional test suites (e.g. mysql-test-extra-5.0)
-#   - to specify files with lists of tests both for initialization of
-#     stress db and for further testing itself
-#   - to define number of threads that will be concurrently used in testing
-#   - to define limitations for test run. e.g. number of tests or loops
-#     for execution or duration of testing, delay between test executions, etc.
-#   - to get readable log file which can be used for identification of
-#     errors arose during testing
+#   - To stress test the mysqltest binary test engine.
+#   - To stress test the regular test suite and any additional test suites
+#     (such as mysql-test-extra-5.0).
+#   - To specify files with lists of tests both for initialization of
+#     stress db and for further testing itself.
+#   - To define the number of threads to be concurrently used in testing.
+#   - To define limitations for the test run. such as the number of tests or
+#     loops for execution or duration of testing, delay between test
+#     executions, and so forth.
+#   - To get a readable log file that can be used for identification of
+#     errors that occur during testing.
 # 
 # Basic scenarios:
 #