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How common is it to utilize $ZSTORAGE?

While I can see the benefits that $ZSTORAGE could have if used properly, I have not seen it used in the environments I have worked in. I was wondering if there are any developers that promote its usage.

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Linux Transparent HugePages and the impact to Caché

** Revised Feb-22, 2017

 

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.

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Yape - Yet another pButtons extractor (and automatically create charts)

Working with customers on performance reviews, capacity planning and trouble-shooting I am often unpacking and reviewing Caché and Operating System metrics from pButtons.

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Visualizing the data jungle -- Part II. More sources and nicer output!

In last week's discussion we created a simple graph based on the data input from one file.

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Local instance caché 2016 messed up; server availability error

Hi all, This is a bit embarrassing, and not that critical.  I have a local instance of Caché 2016 on my computer, for playing around with.

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Lookup Time Complexity of a Global

If I were trying to access an index of a global variable, what time complexity would this operation have?

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How to backup cache to network drive?

We know there are numerous ways to backup cache/ensemble with VMware, but we are not in a state to do that and can't do shadowing because the lack of resources.

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Editing Roles on Backup Mirror member and/or keeping the privileges in sync

Hi,

Initially when setting up a cache instance one creates or imports the user/ resources roles etc .

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Where can I find information on document repositories?

In the table/class HS_Registry.document there is a column/property named RepositoryUniqueId.

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Quality of Service Timeout Guide for Mirroring

Quality of Service Mirroring Timeout Configuration

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Issue with perl and caché

Hello community,
 

I'm triing to use perl with Caché on CentOS 7.

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[2014.13] having to constantly Purge Cached Queries because of 'method does not exist' error

We've been noticing that we're getting this (https://community.intersystems.com/post/cach%C3%A9-sql-error-odbc) error more frequently

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Caché WebTerminal v4 Release

Greetings, InterSystems community!

I am pleased to announce that the web terminal project, Caché WebTerminal version 4 gets its release! After long period of enhancing this web application from 2013, it came to the version 4, which features major stability and security improvements, intelligent autocomplete and syntax highlighting, convenient SQL mode and a lot of other useful features.

The goal of this article is to spread the knowledge about this project over the InterSystems community.

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What is the base formula used for calculating global storage?

Can someone direct me to where in the documentation we can find how consumption may be calculated for global storage?

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Is it possible to query on Production items using Deep See?

My group needs to be able to monitor items / tasks, and let a non-management-portal user see the monitoring.  Is it possible to run DeepSee queries on Production items?

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