Regarding error "Insufficient memory - Lock Manager Pool is full"

HCL Domino Domino Forum
1

Dear All,

We need your assistance regarding an issue. We are getting an error message "Insufficient memory - Lock Manager Pool is full" in the console log. We are unable to view the mailbox.

Community-Pasted-Attachment-1724302061629.png468×168 29.2 KB

Mails are not coming in as well as not going outside. Please help us on this.

Thank you in advance for your help.

2

Can you kindly check if there are NSD's that has been generated automatically, else run a manual NSD and I suggest on opening a ticket so that we can further investigate the issue. That error message may cause by several issues, and an NSD file which contains call stack may help us identify its root cause.

But for the meantime, maybe you can try re-create your mailboxes, by simply renamin it to mail.old, then start up the server again, if there are mails stuck in the old mail box, simply copy and paste it on the new one.

3

Hello,

Reason for this error could be corrupt db(s) that's preventing the txn locks from being released.
If you see this often, you can increase this pool size via MAX_LOCK_POOL_SIZE

Set this ini's, need to restart server after.
max_lock_pool_size=2048 . This could be low for your server if you see this error often

Regards

Hitesh G

4

Hi @Account Operator ,

Increase the size of the lock manger Pool using the following notes.ini parameter and check if issue gets resolved:

MAX_LOCK_POOL_SIZE=32768
MAX_LOCKS_EXP_TRANS=32768

In case, it above recommendation works for you please mark response as helpful for others to be benefited.

Thanks

Pratap Mishra

5

Hi Pratap,

Can you explain what the parameter MAX_LOCKS_EXP_TRANS means? Is this parameter also valid for Release 12.0.2FP1 on OS400 V7R4M0 (IBM i)?

Kind regards

Oliver Kaltenecker.

6

Hi @Oliver Kaltenecker ,

MAX_LOCKS_EXP_TRANS stand for "Locks per expilicit transaction limit".

It is valid for Note Client V12 as well, though I am not sure about OS400 V7R4M0 (IBM i) .

Thanks

Pratap Mishra

7

If encountering this error; "Insufficient memory - Lock Manager Pool is full", the immediate recommendation is to set MAX_LOCK_POOL_SIZE=2048 or 4096 and asses if this resolves the error message. If not than please raise a case with HCL Support so we can further asses the condition leading to this error.

-Niels

8

Hello @Oliver Kaltenecker 

Please increase the size of the lock manager Pool using the following notes.ini parameter  
MAX_LOCK_POOL_SIZE=20480  this increases the size of the BLK_LKMGR_POOL to 20M

Please restart the domino server once after adding mentioned parameter and then check.

The mentioned error message indicates possibility of corrupt mail box. Please check the size of the mentioned mail box. 
Also, please perform maintenance on the mentioned mailbox once and then check.

I hope this is helpful to you. If this answer is beneficial, please accept it to benefit others with the same problem/query. 

Regards,
Pramod