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author | Ilya <ilyamaschenko@gmail.com> | 2017-02-27 17:27:53 +0900 |
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committer | Ilya <ilyamaschenko@gmail.com> | 2017-02-27 17:27:53 +0900 |
commit | 5e644492edc2b3ac3d6077fb22ef8dc94ffd92d8 (patch) | |
tree | 63ab6869a25a7237864888f50c2217f710430f54 /python.d | |
parent | 9c92673e12eabcae2b518d0f1d36db3b5ce13013 (diff) |
mongodb_plugin: python README update
Diffstat (limited to 'python.d')
-rw-r--r-- | python.d/README.md | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/python.d/README.md b/python.d/README.md index 5fccf30b8d..d21d2d83ec 100644 --- a/python.d/README.md +++ b/python.d/README.md @@ -710,6 +710,149 @@ If no configuration is given, module will attempt to connect to memcached instan --- +# mongodb + +Module monitor mongodb performance and health metrics + +**Requirements:** + * `python-pymongo` package. + +You need to install it manually. + + +Number of charts depends on mongodb version, storage engine and other features (replication): + +1. **Read requests**: + * query + * getmore (operation the cursor executes to get additional data from query) + +2. **Write requests**: + * insert + * delete + * update + +3. **Active clients**: + * readers (number of clients with read operations in progress or queued) + * writers (number of clients with write operations in progress or queued) + +4. **Journal transactions**: + * commits (count of transactions that have been written to the journal) + +5. **Data written to the journal**: + * volume (volume of data) + +6. **Background flush** (MMAPv1): + * average ms (average time taken by flushes to execute) + * last ms (time taken by the last flush) + +8. **Read tickets** (WiredTiger): + * in use (number of read tickets in use) + * available (number of available read tickets remaining) + +9. **Write tickets** (WiredTiger): + * in use (number of write tickets in use) + * available (number of available write tickets remaining) + +10. **Cursors**: + * opened (number of cursors currently opened by MongoDB for clients) + * timedOut (number of cursors that have timed) + * noTimeout (number of open cursors with timeout disabled) + +11. **Connections**: + * connected (number of clients currently connected to the database server) + * unused (number of unused connections available for new clients) + +12. **Memory usage metrics**: + * virtual + * resident (amount of memory used by the database process) + * mapped + * non mapped + +13. **Page faults**: + * page faults (number of times MongoDB had to request from disk) + +14. **Cache metrics** (WiredTiger): + * percentage of bytes currently in the cache (amount of space taken by cached data) + * percantage of tracked dirty bytes in the cache (amount of space taken by dirty data) + +15. **Pages evicted from cache** (WiredTiger): + * modified + * unmodified + +16. **Queued requests**: + * readers (number of read request currently queued) + * writers (number of write request currently queued) + +17. **Errors**: + * msg (number of message assertions raised) + * warning (number of warning assertions raised) + * regular (number of regular assertions raised) + * user (number of assertions corresponding to errors generated by users) + +18. **Storage metrics** (one chart for every database) + * dataSize (size of all documents + padding in the database) + * indexSize (size of all indexes in the database) + * storageSize (size of all extents in the database) + +19. **Documents in the database** (one chart for all databases) + * documents (number of objects in the database among all the collections) + +20. **tcmalloc metrics** + * central cache free + * current total thread cache + * pageheap free + * pageheap unmapped + * thread cache free + * transfer cache free + * heap size + +21. **Commands total/failed rate** + * count + * createIndex + * delete + * eval + * findAndModify + * insert + +22. **Locks metrics** (acquireCount metrics - number of times the lock was acquired in the specified mode) + * Global lock + * Database lock + * Collection lock + * Metadata lock + * oplog lock + +23. **Replica set members state** + * state + +24. **Oplog window** + * window (interval of time between the oldest and the latest entries in the oplog) + +25. **Replication lag** + * member (time when last entry from the oplog was applied for every member) + +26. **Replication set member heartbeat latency** + * member (time when last heartbeat was received from replica set member) + + +### configuration + +Sample: + +```yaml +local: + name : 'local' + host : '127.0.0.1' + port : 27017 + user : 'netdata' + pass : 'netdata' + +``` + +If no configuration is given, module will attempt to connect to mongodb daemon on `127.0.0.1:27017` address + +--- + + # mysql Module monitors one or more mysql servers |