Cisco Cisco Email Security Appliance X1070 문제 해결 가이드

This document describes how to install a memory kit on an Email Security Appliance (ESA) C370,
C670, and X1070.

C360s, C370s, C660s, C670s, X1060s, and X1070s with less than 8 GB of memory, under certain
configurations and traffic, can lag from excessive memory use and swapping after you upgrade to
AsyncOS 8.5.x.

All C360, C660, and X1060 and the C370, C670, and X1070 appliances shipped initially have 4
GB of RAM and, under certain configurations and traffic, can lag (present delays) from excessive
memory usage and swapping (when the operating system (OS) uses the hard disk as temporary
memory) after you upgrade to AsyncOS 8.5.x.

With certain types of traffic, especially when there is a spike in email traffic, the affected Email
Security Appliance (ESA) models lag heavily. This latency is most common on ESAs with many
features enabled, which include clustering and Security Management Appliance (SMA)
connections that can contribute to the overall system lag.

For earlier software versions, there is a gradual slowdown due to excessive memory swapping.
The current AsyncOS handles light and medium swapping situations with no noticeable lag, but