Hi Stephen and welcome to our forums!
First of all the error you have reported is about the PermGen space, so I can suggests to increase it to 350, as reported on our Installation Guide:
Code:
(zimbra user)$ zmlocalconfig mailboxd_java_options
And change the PermSize options:
Code:
{-XX:PermSize=128m -XX:MaxPermSize=128m} -> {-XX:PermSize=192m -XX:MaxPermSize=350m}
About the Heap_size on a 32 bit Pae kernels you cannot use 4Gb for a single process (Frequently Asked Questions About the Java HotSpot VM)
The maximum theoretical heap limit for the 32-bit JVM is 4G. Due to various additional constraints such as available swap, kernel address space usage, memory fragmentation, and VM overhead, in practice the limit can be much lower. On most modern 32-bit Windows systems the maximum heap size will range from 1.4G to 1.6G. On 32-bit Solaris kernels the address space is limited to 2G.
...so I can sugegst to try to set your mailboxd_java_heap_size to 2200 (something near that value):
Code:
zmlocalconfig -e mailboxd_java_heap_size=2200
Have a nice day.
D0s0n
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