Start/notes.ini Parameters/Memory_Quota

Memory_Quota

🛠️
Parameter: Memory_Quota
Short description: Hard limit on the shared memory a Notes process (especially the 32-bit Notes Client) is allowed to allocate.

Profile

Parameter
Memory_Quota
Category
Performance / Memory
Component
Client
Available since
R5
Supported versions
9.0.1, 10.0, 11.0, 12.0, 14.0, 14.5
GUI equivalent
notes.ini only (no GUI)
Possible values
Megabytes (integer); minimum 4 MB; e.g. 1024 (= 1 GB); 0 = no limit

Description

Memory_Quota sets a hard upper bound on how much shared memory a single Notes process is allowed to occupy. Important: per HCL conf_memory_quota_r, the value is specified in megabytes (minimum 4 MB) — not bytes! This matters above all in the 32-bit Notes Client, where the address space is naturally limited and large mail files or XPages previews are prone to push the process into OOM.
For 64-bit servers the switch is less relevant; it can still be used to test what happens if a particular memory value is not exceeded.

Example configuration

; Value in megabytes (HCL conf_memory_quota_r); minimum 4 MB
Memory_Quota=1024

Notes & pitfalls

  • Value in megabytes (per HCL conf_memory_quota_r; minimum 4 MB).
  • When the limit is reached, a further allocation fails – typically with “Insufficient memory” or a crash.
  • Usually not necessary for 64-bit Notes / Domino.
  • Mainly useful in Citrix / terminal server environments with many 32-bit Notes sessions.
  • The change only takes effect after a Notes restart.