connection-pooling

问题 Does anyone know why I continually get this error from cloud functions (google cloud functions) when using ioredis module? [ioredis] Unhandled error event: Error: read ECONNRESET at _errnoException (util.js:1022:11) at TLSWrap.onread (net.js:628:25) error log sample The error never stops. It doesn't affect normal operation (meaning, I can perform all desired operaitons just fine with ioredis module & my redis). Its incredibly obnoxious and makes it impossible to debug cloud function

问题 I found this in the Tomcat documentation here What I don't understand is why they close all the JDBC objects twice - once in the try{} block and once in the finally{} block. Why not just close them once in the finally{} clause? This is the relevant docs: Random Connection Closed Exceptions These can occur when one request gets a db connection from the connection pool and closes it twice. When using a connection pool, closing the connection just returns it to the pool for reuse by another

问题 I have one couchdb database and I am querying it in parallel. Now, I want to create a connection pool, because I discovered a bottleneck in my design - I was using a single instance of couchd , so parallelization was failing due to that. I searched the web for connection pool implementations, but I was not able to find a proper java connection pool implementation for couchdb - most of the frameworks support relational databases. I will be appreciated if someone can help me for that. 回答1: I've

问题 My NodeJS application hangs on the “find” query of the MongoDB when accessed by the 200 or more users simultaneously. To demonstrate/reproduce the issue I have built following small POC which has one route and it connects to the MongoDB and fetches the data. When I create around 500 simultaneous request using LoadUIweb, sometimes, the “findone” function of collection never returns. var express = require('express'); var mongodb = require('mongodb'); var config = require('../Config/Config');

问题 I have a doubt that whether Pooling actually works with vb.net. I used below query to check the connection to the database from different pc. SELECT hostname,p.status,[program_name],loginame,name FROM Master..sysprocesses as p join master.dbo.sysdatabases as d on p.dbID = d.dbID WHERE p.ecid=0 and p.hostname<>'' order by name In the output i saw more than one connection from a pc to the same database. So i got doubt about this.In my vb.net application i open connection only once so i was

问题 Does anyone know a PHP extension to use mod_dbd for database connections? Our application needs to access a remote database. It used to be an Apache module using mod_dbd for database connections and the transaction takes about 200ms. Now we changed the application to PHP and the same transaction takes over 600ms now. We hope some kind of pooling will improve the performance. We switched to use mysql_pconnect() but it doesn't work nearly as good as mod_dbd. 回答1: I know you have probably given

问题 Intro: Using VS 2013, .Net 4 creating a library to connect/use a Microsoft Access database (part of 3rd party application - choice of database is not an option) to be used by our parent product. Reason to pool: connections being made by multiple tablet PCs located throughout an industrial facility. Concerns regarding performance. What do I need to add to the connection string, how do I initialize it? When and how do I kill it? Has anyone dealt with this before? Why: Answers I have found so

问题 How can I implement a connection pooling in Java? There is some pattern? I should use some connections and release it. This connection should be closed after a few times. 回答1: You can use some libraries. For JDBC connection pooling check out bonecp, c3p0 or dbcp. If you need a general purpose pooling, see commons Pool, which dbcp is built on. 来源： https://stackoverflow.com/questions/12640608/connection-pooling-pattern

问题 I have a auto increment column of type bigint. Calling mysql_insert_id() works good for getting the previously inserted id for the connection. Does it work great(identifying the last inserted id) even if a connection pool in a tomcat container is used ? 回答1: Don't use database specific code like that, it'll only make your code less portable. Instead use the Statement.RETURN_GENERATED_KEYS option when executing an update. Here's a start to your searches: sql jdbc getgeneratedkeys returns

问题 Previously in scripting in Google Apps Script , I opened and closed my Jdbc connection in all the functions. In order to speed up my application, it seems to be better to leave the connection open and use it in another function. However, I don't know how I should do that in Google Apps Script . Can anyone give me a suggestion or an example? 回答1: Here is an example of how to retain your connection at ScriptDB. function myFunction() { var conn = ScriptDb.getMyDb().query({name : "my_connection"}