Skip to content

Commit 5f76abf

Browse files
committed
Tech review revisions
1 parent 02a9925 commit 5f76abf

1 file changed

Lines changed: 9 additions & 3 deletions

File tree

support/windows-server/active-directory/troubleshoot-event-2866-maximum-audit-queue-size.md

Lines changed: 9 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,9 @@ appliesto:
1515
---
1616
# Troubleshoot Event ID 2866 (maximum number of cached audit events)
1717

18-
This article describes several methods to use to fix Event ID 2866, and discusses how to identify which methods are appropriate for your situation.
18+
## Summary
19+
20+
Event ID 2866 occurs when your system generates more audit events for the Security log than the local transaction audit queue can hold. This article describes several methods to use to fix this situation, and discusses how to identify which methods are appropriate to fix your situation.
1921

2022
## Symptoms
2123

@@ -124,13 +126,17 @@ The rate at which AD DS generates audit events depends on factors that include t
124126
- How many event sources that you configured for auditing
125127
- The type of auditing (such as success auditing, failure auditing, or successful read auditing). For example, all the following categories of operations can generate failure or success auditing:
126128

129+
- [Sign in (aka Logon) auditing](/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/audit-logon)
130+
- [Credential validation auditing](/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/audit-credential-validation)
131+
- [Kerberos Authentication Service auditing](/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/audit-kerberos-authentication-service)
132+
- [Kerberos service ticket operations auditing](/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/audit-kerberos-service-ticket-operations)
127133
- [File system auditing](/windows-hardware/drivers/ifs/auditing) (this category can also generate successful read auditing)
128134
- Directory Service auditing (this category can also generate successful read auditing)
129135
- [Windows Filtering Platform auditing](/windows/win32/fwp/auditing-and-logging)
130136
- Process detailed activity auditing
131137

132138
> [!NOTE]
133-
> Success auditing is typically very verbose.
139+
> Success auditing is typically very verbose, especially for authentication-related operations. Remember that Kerberos authentication applies not only to user requests but also to application and service communications.
134140
135141
### Cause 2: A single transaction generates too many audit events
136142

@@ -198,7 +204,7 @@ To increase the capacity of the transaction audit queue, follow these steps:
198204

199205
- Value: `Maximum Audit Queue Size`
200206
- Type: `REG_DWORD`
201-
- Data: An integer between 17,000 and 4,294,967,295 (omit commas from the data). The default is `17000`, and the minimum is `100`.
207+
- Data: An integer between `100` and `4294967295`. The default is `17000`.
202208

203209
> [!NOTE]
204210
> The value measures the number of audit events that the queue can cache. It doesn't measure memory usage. If your issue is the number of audit events per transaction, make sure that the number you use is large enough to handle that number of events (for example, use a number that's larger than the number of members of the largest group).

0 commit comments

Comments
 (0)