About Gam update
IntroductionRequirementsInstallation - First time GAM7 installationInstallation - Upgrading from Legacy GAMIntroductionGAM7 is a free, open source command line tool for Google Workspace Administrators to manage domain and user settings quickly and easily.This page provides simple instructions for downloading, installing and starting to use GAM7.GAM7 requires paid, or Education/Non-profit, editions of Google Workspace. G Suite Legacy Free Edition has limited API support and not all GAM commands work.GAM7 is a rewrite/extension of Jay Lee's Legacy GAM, without his efforts, this version wouldn't exist.GAM7 is backwards compatible with Legacy GAM, meaning that if your command works with Legacy GAM, it will also work with GAM7. There may be differences in output, but the syntax is compatible.DocumentationDocumentation for GAM7 is hosted in the GitHub Wiki and in Gam*.txt files.Mailing List / Discussion groupThe GAM mailing list / discussion group is hosted on Google Groups. You can join the list and interact via email, or just post from the web itself.Chat RoomThere is a public chat room hosted in Google Chat. Instructions to join.Source RepositoryThe official GAM7 source repository is on GitHub in the master branch.AuthorGAM is maintained by Jay (James) Lee and Ross Scroggs. Please direct "how do I?" questions to Google Groups.RequirementsTo run all commands properly, GAM7 requires three things:An API project which identifies your install of GAM7 to Google and keeps track of API quotas.Authorization to act as your Google Workspace Administrator in order to perform management functions like add users, modify group settings and membership and pull domain reports.A special service account that is authorized to act on behalf of your users in order to modify user-specific settings and data such as Drive files, Calendars and Gmail messages and settings like signatures.Installation - First time GAM7 installationUse these steps if you have never used any version of GAM in your domain. They will create a GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationInstall: How to Install Advanced GAMInstallation - Upgrading from Legacy GAMUse these steps if you have used any version of Legacy GAM in your domain. They will update your GAM projectand all necessary authentications.Download: Downloads-InstallsConfiguration: GAM7 ConfigurationUpgrade: How to Upgrade from Legacy GAMYou can install multiple versions of GAM and GAM7 in different parallel directories.
Key features of the Gam update that are enabled through these drivers include:
- Gam Bay Gam Bay Profiles - Facebook
- GAM-team/GAM: command line management for Google
- GAM7 FAQ GAM-team/GAM Wiki - GitHub
- l Home GAM-team/GAM Wiki - GitHub
- Gam o Online - Jogar Gam o - FlyOrDie
- Calendars Access GAM-team/GAM Wiki - GitHub
- Downloads Installs GAM-team/GAM Wiki - GitHub
(ColumnStore indexes, temporal tables, In Memory OLTP, etc.) all these new features require new metadata to be tracked, therefore the number of system tables we need to delete from is increasing, which makes the process more impactful.Temp table cache contention can be more prominent on larger SQL Server environments, larger core counts and as the size of the cache and the number of concurrent threads accessing the cache grows, this can introduce slower cache access as well as contention for the memory object associated with the cache.This condition can manifest in two different ways: CMEMTHREAD waits and SOS_CACHESTORE spinlock waits. To address temp table cache contention, it is recommended to track these wait conditions for evidence and ensure you have installed the latest cumulative updates (CUs) for SQL Server.Check out our Tech Community blog for more information on temp table caching in SQL Server.SQL Server 2022 tempdb improvementsIn SQL Server 2022 we have addressed the final common areas of contention by introducing concurrent GAM and SGAM updates similar to the Concurrent PFS updates.We use the Global Allocation Map (GAM) pages when we are looking for uniform extents and the Shared Global Allocation Map (SGAM) pages when we are looking for mixed extents in tempdb.In previous releases, under higher concurrent workloads we may have GAM contention where many different threads attempt to allocate extents on the same GAM page and each thread must first wait for another thread to release their UPDATE latch before they can obtain their own latch to allow them to make changes—so, we are just waiting in line.As can be seen in the workload example below, on SQL Server 2019 there is a wall of GAM contention driving over 123,000 counts of contention with the longest wait taking 949 milliseconds.The reason for this is that with the update latch, only one thread can modify the GAM page at a time, leading to contention. This is the primary reason we still need multiple data files and because of this contention, SQL Server throughput is decreased and workloads that require many updates to the GAM page will take longer to complete while the machine’s CPU will be underutilized. This contention is due to the workload volume and especially the use of repetitive create-and-drop operations.Starting with SQL Server 2016, we changed the default behavior to always allocate uniform extents when creating new objects in tempdb. This helped avoid most of the SGAM contention, but we still use mixed extents for Index Allocation Map (IAM) page allocations. IAM pages are used to track all the pages that belong to an object, so every object that gets created has at least one IAM page. For most workloads, these IAM page allocations don’t
