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buffer pool, but will eventually need to write these pages to disk. Some general I/O tuning steps can speed up this process when I/O to a page is written to disk, such as: Distribute tablespaces across multiple containers (these containers map to different disks). Use the fastest hardware and storage management configuration possible, which includes factors such as disk and channel speed, write caching, and parallel write. Avoid RAID5 (unless used wi
take a look at the final test results?
Note: The tested storage server is e5620 @ 2.40 GHz, with 24 GB memory and centos operating system. The suppression machine is e5504 @ 2.0 GHz, with 4 GB memory and Windows Server 2003 operating system, two Gigabit NICs are directly connected.
From this test, we can see that the single process method is as follows:
1) MongoDB's non-secure insertion method has a very high performance at the beginning, bu
e5620 @ 2.40 GHz, with 24 GB memory and centos operating system. The suppression machine is e5504 @ 2.0 GHz, with 4 GB memory and Windows Server 2003 operating system, two Gigabit NICs are directly connected.
From this test, we can see that the single process method is as follows:
1) MongoDB's non-secure insertion method has a very high performance at the beginning, but the performance decreases sha
) GTID2) in MySQL 5.6 gtid mode synchronous replication error cannot skip the workaround3) Improvement of Gtid replication in MySQL5.74) Gtid Replication traps5) Improvements to Gtid replication in MariaDB 10.1MySQL 5.6/5.7 Security recovery from library crashMariaDB 10.0/10.1 security recovery from vault crashSlave multi-threaded replication from librariesSlave supports multi-source replicationMySQL 5.7 Set synchronous replication filtering without restarting the MySQL service processThis artic
The performance test of MONGODB billion data volume was carried out, and the following items were tested:(All inserts are single-threaded and all reads are multithreaded)1) Normal insertion performance (the inserted data is about 1KB per piece)2) Bulk Insert performance (usi
memory and CentOs operating system. The suppression machine is E5504 @ 2.0 GHz, with 4 GB memory and Windows Server 2003 operating system, two Gigabit NICs are directly connected.
From this test, we can see that the single process method is as follows:
1) Mongodb's non-secure insertion method has a very high performance at the beginning, but the performance decreases sharply after it reaches 20 million da
more than 3 million is a little more time-consuming.While the test is open to read data at the same time in a test phase, which reads the data simultaneously and writes the data, it is not found that this results in a sharp decrease in performance and a slight slowdown.Iv. Related SolutionsLater, asynchronously, I used a thread pool to synchronously perform all the insertions and reads, and found that it was significantly more efficient and did not d
handlersocket. Therefore, we can see that the number of QPS is significantly greater than the number of TPS, and batch insert operations significantly improve the overall performance.
MongoDB adopts the method of merging operations internally. Data is first stored in the memory and then flushed to the disk. Therefore, from the test data, we can see that the
1. Test ToolsThis test chooses YCSB (Yahoo! Cloud System Benchmark) as the test Client tool. YCSB is a NoSQL test tool for Yahoo Open source, used to test the performance of a variety of NoSQL, project address: Https://github.com/brianfrankcooper/YCSB. The project's MongoDB directory has detailed installation and testing methods. YCSB supports common NoSQL database reads and writes, such as inserting, modif
We are going to perform a simple test on reading and writing MongoDB, Redis, and Tokyo Tyrant. To perform a fair test, we need to understand the implementation mechanism behind them. Below are some comparisons:Comparison of storage implementation:* Memory File Image (Memory-File Mapping) Redis, MongoDB* File + Cache Tokyo Tyrant* Memory: Redis, Tokyo TyrantKey/Value index format:* B + Tree:
you can't do it. MongoDB leads the nosql movement. Note that the most important thing we oppose is the SQL methodology. You can only get disappointed when using mangodb using SQL. Think about MongoDB's design philosophy: docization. _ Id is the file name, And MongoDB is a file system. Full-text search? Don't bother. Use a file name to find a file. A file name corresponds to a file, and you will never be di
MONGDB Performance pressure test, random query, data volume 100 million records
Operating system centos6.4x64 bit
From the test results, when MongoDB all the data into memory, query speed according to the size of the document, performance bottlenecks are usually in the network traffic and CPU processing performance (
.
(11) In addition to prefix-style queries, regular expression queries cannot use indexes and execute longer than most selectors, and they should be used sparingly.
(12) In an aggregation operation, $match the number of documents to be processed by the $ group operator in front of the $ group, by $match predecessor.
(13) Modifying a document by using an operator typically provides better performance because it does not require a round-trip se
: Perform as root:
It then monitors all packet requests to local localhost listening to MongoDB on the default 27017 port.
2.Mongostat
This tool allows you to quickly view statistics field descriptions for a group of MongoDB instances in run:Insert: Insert amount per secondquery: Query amount per secondUpdate: Update amount per secondDelete: R
Tags: wan theory large number of connections coded pad memory alt modeThe performance test of MONGODB billion data volume was carried out, and the following items were tested:(All inserts are single-threaded and all reads are multithreaded) 1) Normal insertion performance (the inserted data is about 1KB per piece) 2) Bulk Ins
, what you need to do as a technician is to increase the performance of the software and the number of users at the same time, even faster than the increase in user volume.
MongoDB Performance Optimization
The database performance has the vital influence to the software overall p
is acceptable, but under large pressure performance has a significant drop, and is not called linear.NDB data in memory, plus a set of 3 redundancy, the default configuration of memory quickly consumed, you need to manually set the use of memory size. The establishment of visual data redundancy is synchronous.NDB data because it is in memory, the test performance is not too bad. NDB is the bottom of the si
1, your single value contains all the data of a user, and it will be larger.
If the query client and database server are not in the same data center, traffic will become a major bottleneck.
The query function we should use is findone ({_ ID: XXX}, filter), which sets the returned filter conditions, which will be filtered out before being sent to you.
For example, findone ({_ ID: XXX}, {items:{"$ Slice": [3, 1]}). This is the same as the elegant code above, but it consumes a small amount of
represents the number of documents scanned.2 If the information is incomplete, you can try to use a different version of the client.
Optimizer: Profiler
Open function.
1 can be started by adding parameters:-profiler=12 Execution Command: Db.setprofilinglevel (1)
Query record: Db.system.profiler.find ()
Performance Tuning Overview
analyzed from the bottom to monitor which commands are sent to the MongoDB to perform: Perform as root:
$./mongosniff--source NET Lo
It then monitors all packet requests to local localhost listening to MongoDB on the default 27017 port.
2.Mongostat
This tool allows you to quickly view statistics field descriptions for a group of MongoDB instances
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