InterSystems Developer Community is a community of 11,969 amazing developers
We're a place where coders learn and share, stay up-to-date, grow together and have fun!
Learn more
Log in

** Revised Feb-12, 2018

While this article is about InterSystems IRIS, it also applies to Caché, Ensemble, and HealthShare distributions.

Introduction

Memory is managed in pages. The default page size is 4KB on Linux systems. Red Hat Enterprise Linux 6, SUSE Linux Enterprise Server 11, and Oracle Linux 6 introduced a method to provide an increased page size in 2MB or 1GB sizes depending on system configuration know as HugePages.

At first HugePages required to be assigned at boot time, and if not managed or calculated appropriately could result in wasted resources. As a result various Linux distributions introduced Transparent HugePages with the 2.6.38 kernel as enabled by default. This was meant as a means to automate creating, managing, and using HugePages. Prior kernel versions may have this feature as well however may not be marked as [always] and potentially set to [madvise].

Transparent Huge Pages (THP) is a Linux memory management system that reduces the overhead of Translation Lookaside Buffer (TLB) lookups on machines with large amounts of memory by using larger memory pages. However in current Linux releases THP can only map individual process heap and stack space.

6 9
4 4,245

Thank you to everyone who joined our User Group Session yesterday!

It was great showing off the new Deltanji Production Component driver that facilitates source control of interoperability productions, and we had some really insightful discussions as well.

If you missed out on the session and would like a copy of the recording, feel free to drop me a message. 

1 0
0 94

In this article, I would show how you can upload and download files from InterSystems products via http.

The questions about working with files over http arise fairly often on community and I'm usually linking to my FileServer project which demonstrates file upload/download but I'd like to talk a bit more on how we can serve and receive files from InterSystems products.

5 3
3 1,959

I was able to run the Cache terminal from the command prompt with the following command, in the namespace that I provided in the brackets:

cterm /console=cn_ap:ENSEMBLE[TEST_1]

But the command suddenly stopped opening the terminal in the correct namespace. It just opens it in the default namespace. I tried it with different namespaces or invalid namespaces, it always opens the terminal in the default namespace now.

I cannot figure out what is causing this behaviour.

0 5
0 812

Hi,

I'm often required to copy the database from production to test.

This is to 'refresh' the database on test.

To achieve this I copy all required IRIS.DAT files from production to test.

The nodes are mirrored on production.

The nodes are not mirrored on test.

Each of the database files IRIS.DAT has a mirror attribute.

Is there a way of checking if the mirror attribute is set for the database file? eg. an objectScript program

0 4
0 142

Hello community! I'm working on an internal innovation effort at InterSystems considering our documentation/resources around upgrades. As part of this, I'd love to have your answers to any/all of the following questions, either via comment or (if you prefer your answers to be more private) direct message.

Thanks in advance!

What InterSystems products + versions are you running? ($zv is ideal.)

What makes you decide to upgrade?

What are your blockers to upgrading?

What is your process for evaluating and planning a possible upgrade?

4 12
0 264

Is there a way to add specific table permissions to a security role programmatically? I'm working on scripting some of the initial setup work when we sell certain add-ons to our software, and I see how I can assign resources to a role and give it a description, but I don't see how I tell it that this role gives the user, for example, SELECT privileges only on the invoices table, or SELECT, INSERT, UPDATE, and DELETE.

0 1
0 80

Today we will talk about Adaptive Analytics. This is a system that allows you to receive data from various sources with a relativistic data structure and create OLAP cubes based on this data. This system also provides the ability to filter and aggregate data and has mechanisms to speed up the work of analytical queries.

5 0
1 195

A mistake happened and records were assigned the wrong assigning authority name: PID3.4.

Everything else was correct. This resulted in duplicate records. Ex

Record 1: MRN1 has AA1 and clinical data

Record 2: MRN1 has AA2 and the same clinical data as Record 1 + more clinical data that is not in Record 1

I would like to remove Record 2 ensuring that there are no orphan records left.

0 1
0 113

Hi,

If I test the Native api for Node.js from the documentation, I noticed (if I'm correct) all methods and calls are synchronous. By default due to the nature of Node.js, there is only one thread of execution and normally all JavaScript methods and all calls should be asynchronous and use either a callback function (the "old way") or promises or the async/await contruct to return their result, e.g.:

0 11
0 174

InterSystems is pleased to announce the 2022.2 release of InterSystems IRIS Data Platform, InterSystems IRIS for Health, HealthShare Health Connect, and InterSystems IRIS Studio are now Generally Available (GA).

3 0
0 205

VetsEZ is looking for an InterSystems Technology Platform - Practice Lead to serve our Federal healthcare customers. As a lead systems integrator, VetsEZ has been delivering large-scale implementations for various federal customers, including the Department of Veterans Affairs (VA), with the world's largest footprint of InterSystems technologies. InterSystems Technology Platform comprises core technologies, including HealthShare, Caché, IRIS, Ensemble, DeepSee, and iKnow.

0 0
0 49

VetsEZ is seeking a full-time remote InterSystems HealthShare / IRIS Architect to design and deliver integrated health solutions for our federal healthcare clients with a focus on automation and semantic interoperability. This role focuses on understanding complex technical and business requirements and translating them into highly scalable, robust integration architectures. Act as a technical lead, and mentor team members while maintaining a hands-on role.

The candidate must reside within the continental US.

Responsibilities:

0 0
0 62

I have a module that sends EMAIL from a Cache INT routine (listed below).

In order to make sure the columns align in the body of the message that the recipient receives I want to force the setting of the FONT and SIZE in the body.

Does anyone know what I need to insert in this code in order to control font and size?

Alternatively is there a way to send mail from within Cache that will keep column data aligned?

Thanks.

________________________________________________________

s server=##class(%Net.SMTP).%New()

0 1
0 66

The topic of for/while loop performance in Caché ObjectScript came up in discussion recently, and I'd like to share some thoughts/best practices with the rest of the community. While this is a basic topic in itself, it's easy to overlook the performance implications of otherwise-reasonable approaches.

21 21
2 7,825