postgres monitoring

great performance boost. If you're doing something about geospatial data right now, and you need tools that are better than earth_distance extensions, then PostGIS is your best choice.10.JSONBStarting with Postgres 9.2, each version of Postgres has JSON in it, with each new version being upgraded and being progressively perfected into a more perfect library. In the latest release of version 9.5, the output

Postgres log utility has to say that Postgres logs (pg_log, similar to the oracle alter file, rather than pg_xlog) are indeed flexible and feature-rich, the following are some management functions using ipvs logs. The parameters involved are in the file $ PGDATApostgresql. conf. OS: CentOS6.2DB: Postgre Postgres log utility has to say that

The last in a series of Postgres posts, Pat Shaughnessy wrote based on he presentation at the Barcelona Ruby Conference. You can also watch the video recording of the presentation. The series was originally published in his personal blog, and we is republishing it on codeship with his kind permission. You can also read posts one, both, and three in the series.We all know indexes is one of the most powerful and important features of relational database

POSTGRES-XL Cluster construction and testing CentOS6.5 192.168.0.101 CentOS6.5 192.168.0.102 CentOS6.5 192.168.0.103 CentOS6.5 192.168.0.104 First, host planning Cnode1 (GTM) cnode2 (Gtm_proxy,coordinator,datanode) cnode3 (Gtm_proxy,coordinator,datanode) cnode4 ( Gtm_proxy,coordinator,datanode) Cnode5 (Gtm_proxy,coordinator,datanode) Second, configure host hosts on each node #vim/etc/hosts 192.168.0.101 cnode1 192.168.0.102 cnode2 192.168.

Learn the PG start-up process today.The start command for pg./bin/postgres-d Path/to/data.1. Subject monitoring ProcessThe postmaster process enters an infinite loop, waiting for the client to request and provide the requested service. In an infinite loop, the postmaster process periodically checks for client service requests by invoking the operating system interface Select, if not, resumes the loop and, i

-wide version of concurrency control (MVCC).When you start a trade or query at POSTGRES-XL, you will see consistent data across the cluster. When you read your data in a connection, even in the absence of any lock in the other connection,You can update the same table. Thanks to global transaction identifiers and snapshots, these connections are using their own version of the row. The reader and the writer do not block each other.Components Gl

POSTGRES-XL is a fully acid-compliant, open-source, easy to scale, multi-tenant security. Support share-nothing; Support massive data parallel processing-mpp (massively Parallel processing). is not very similar to Greenplum. Host Assignment3 host, install centos6.2. Of course, you can prepare more than one server; This depends on the scenario (the GTM is a separate host; The exception is that each machine is best equipped with one coordinator and one

provided by using the revolutionary serializable snapshot Isolation (SSI) level. Today we start with the basics of PostgreSQL and talk about the features of MVCC and PostgreSQL. Here, we first use a table to show the level of transaction in PostgreSQL, and we can turn it back when we see the later chapters. 1. Basic Knowledge 1.1 Transaction ID When a transaction begins, the transaction management system in PostgreSQL assigns a unique identifier, the transaction ID (TXID), to the t

Sometimes, what if I forget the password of the default user Postgres when PostgreSQL is installed?Linux shell command input below: sudo-u postgres psql (so that you can directly login into the Postgres, and then in the inside can be added users, change passwords and so on, are not the problem!! ）-------------------------------------------------------------------

Tags: distributed database? POSTGRES-XL: PostgreSQL-based open source extensible DB cluster The recent year the industry to the "IoE" more calls louder, many traditional enterprises have to go to the "IoE" program on the desktop. I always wonder what motivates these non-internet companies, such as banks, to do such things. Tall on the "self-control", "Revitalization of National Science and Technology" and other empty slogan first not to tube, the r

Q. What does XL stand? XL is short for extensible lattice. It also connotes an extra large version of postgresql, in this case when SS multiple systems. Q. Is this a "nosql" solution? No, ipvs-XL supports traditional SQL, stronugly conforms to ansi SQL: 2008, is fully acid, all while being scalable. you can however certainly use it as a key-value store and take advantage of JSON and hstore functionality. Q. Is the data "sharded "? Yes. postgres-X

PGXL Cluster ConstructionA preparation1 Download Install decompression source/opt/Curl-o http://files.postgres-xl.org/postgres-xl95r1beta1.tar.gzTAR-ZXVF postgres-xl95r1beta1.tar.gzMV Postgres-xl95r1beta1.tar.gz POSTGRES-XL2 compiling$ yum-y gcc$ CD POSTGRES-XL$ pwd/opt/

1. Prepare Create a base table first: CREATE TABLE mytb1 (ID serial,name character varying,age integer);To create an index on the name field: Create INDEX Mytb1_name_index on MYTB1 (name); To view the MYTB1 table structure: postgres=# \d mytb1; Table "public.mytb1" Column | Type | Modifiers --------+-------------------+--------------------------------------------

Our company has developed a database product based on Postgres, needless to say we have changed the source code of OSS, and have also integrated and written some plugins. Therefore, when PostgreSQL and related plugins are upgraded, we also need to reflect the upgrade to our products, which is the background.This time the problem occurred when we upgraded PostgreSQL plugin ORAFCE (3.2.0-->3.6.0). As usual, we will upgrade the plugin, organize the sourc

Tags: But i row data GRE Postgre database data Start Menu selection logsA recent in-depth study of the Postgres database, importing data Tables from SQL Server databases used in the original project into postgres, Online Search postgres data import, in addition to the spatial database can be imported through PostGIS 2.0 shapefiles and DBF Loader exporter , No oth

first, what is POSTGRES-XLXL means: Extensible Lattice, can be extended lattice, will be the PostgreSQL application on multi-machine distributed database visualization expression.POSTGRES-XL is a full-acid, open-source, scalable, multi-tenant secure, PostgreSQL-based database solution.The POSTGRES-XL is flexible enough to handle a wide range of loads, such as: OLAP (parallelization via MPP) Olt

Postgres uses returning to implement last_insert_id of mysql. Today, I am asked if postgres has inserted a value like mysql and returned the inserted value. This is yes and has higher scalability. Example: [S @ localhost ~] $ Psqlpsql (9.2.4) Typehelpforhelp. S # createtable Postgres uses returning to implement last_insert_id of mysql. Today, I am asked if

Psql: Fatal error: User "Postgres" Ident authentication failed1 after installing the PostgreSQL database, you need to initialize and some configuration rails project to connect PostgreSQL.After the PostgreSQL data is installed (the Yum command is installed directly)First step: Initialize the database#service PostgreSQL Initdb(Description: After initialization the default PostgreSQL database has a default user post