cognos 10 jvm内存最大可配置多少

报表的运行效率是需要考虑多个方面，jvm仅仅是其中一个影响因素，内存大了管理内存的成本也大了，至于楼主说的设置为1024的倍数，准确的说应该是4的倍数，因为java分配内存都是以4Mb的倍数分配收起

值的大小除了取决于机器的内存，还和运行环境有关系，如果你是32位jre环境不管服务器多大内存，建议设在1.7G一下，超过1.7G就不太稳定，64位的jre环境可以适当大一些，下面是IBM官方推荐的配置

To determine the settings that are best suited for your environment, performance testing is advised.

Use the following memory settings as a starting point and adjust them based on the memory usage of your system.2 GB for the base operating system and accompanying software, such as antivirus, back up, and enterprise management software4 GB for a 64-bit Content Manager JVM4 GB for a 64-bit Application Tier JVM2 GB for the graphics JVM (IBM Cognos Workspace)2-4 GB for the query service (dynamic query mode) JVM1 GB per core for the report services processes (dynamic query mode) (JVM)2 GB per core for the report services processes (compatible query mode) (BIBuS)

The following table shows the suggested memory settings by architectural tier for a 64-bit operating system.

Table 1. Suggested memory settings by architectural tier .

[tr=rgb(181,]	Architectural Tier	Memory settings
IBM Cognos Gateway Tier	2 GB
IBM Cognos Application Tier (compatible query mode)	2 GB per core
IBM Cognos Application Tier (dynamic query mode	4 GB + 1 GB per core
IBM Cognos Content Manager Tier	4 GB

More resources might be required when installing additional software.

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