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dwight 2011-11-13 12:59:59 -05:00
parent 3348083f29
commit fc7b6ecdb3
1 changed files with 8 additions and 6 deletions
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14
client/examples/mongoperf.cpp
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@ -170,14 +170,16 @@ cout <<
" mongoperf < myjsonconfigfile\n"
"\n"
" {\n"
" nThreads:<n>, // number of threads\n"
" fileSizeMB:<n>, // test file size\n"
" sleepMicros:<n>, // pause for sleepMicros/nThreads between each operation\n"
" mmf:<bool>, // if true do i/o's via memory mapped files\n"
" r:<bool>, // do reads\n"
" w:<bool> // do writes\n"
" nThreads:<n>, // number of threads (default 1)\n"
" fileSizeMB:<n>, // test file size (default 1MB)\n"
" sleepMicros:<n>, // pause for sleepMicros/nThreads between each operation (default 0)\n"
" mmf:<bool>, // if true do i/o's via memory mapped files (default false)\n"
" r:<bool>, // do reads (default false)\n"
" w:<bool> // do writes (default false)\n"
" }\n"
"\n"
"mongoperf is a performance testing tool. the initial tests are of disk subsystem performance; \n"
" tests of mongos and mongod will be added later.\n"
"most fields are optional.\n"
"non-mmf io is direct io (no caching). use a large file size to test making the heads\n"
" move significantly and to avoid i/o coalescing\n"