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  • pathsend balancing

    From SRSeedBurners@21:1/5 to All on Wed Feb 23 11:20:04 2022
    Have a question regarding the balancing of pathsend operations. We have multiple single process serverclasses which are doing pathsend operations to a serverclass which has four static processes (no dynamic) each running in its own CPU.

    Originally setup these destination serverclass processes are configured to handle 1/4 of the load and this was assuming the load would be spread somewhat evenly across the processes. However we are finding loads similar to the current production
    snapshot: CPU 0 14% - CPU 1 23% - 34% - 29%. During the day these percentages will shift to, for example: CPU 0 29%- CPU 1 34%-23%-12%. Initially I thought the load was due to the CPU that the senders were located on, but once I found that the load
    was distributed differently depending on when I took a snapshot, the senders never move CPU so can't be the cause.

    Is there a way to balance this from pathway perspective or totally out of our control?

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  • From Bill Honaker@21:1/5 to SRSeedBurners on Wed Feb 23 14:16:23 2022
    On Wed, 23 Feb 2022 11:20:04 -0800 (PST), SRSeedBurners <[email protected]> wrote:

    Have a question regarding the balancing of pathsend operations. We have multiple single process serverclasses which are doing pathsend operations to a serverclass which has four static processes (no dynamic) each running in its own CPU.

    Originally setup these destination serverclass processes are configured to handle 1/4 of the load and this was assuming the load would be spread somewhat evenly across the processes. However we are finding loads similar to the current production
    snapshot: CPU 0 14% - CPU 1 23% - 34% - 29%. During the day these percentages will shift to, for example: CPU 0 29%- CPU 1 34%-23%-12%. Initially I thought the load was due to the CPU that the senders were located on, but once I found that the load
    was distributed differently depending on when I took a snapshot, the senders never move CPU so can't be the cause.

    Is there a way to balance this from pathway perspective or totally out of our control?

    Your source Pathway servers get granted links to the target serverclass on their first call to SERVERCLASS_SEND_.
    This is not done on a load-related manner, it is done based on current available static links and other properties (like linkdepth etc.)

    Unless there is an error on that granted link, the source server will ALWAYS send to the same target server process, until a request takes longer than 'CREATEDELAY' to complete.
    You have no direct control over this, the only control is in managing CREATEDELAY, DELETEDELAY, MAXLINKS and LINKDEPTH (and NUMSTATIC to an extent).

    Bill

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  • From Randall@21:1/5 to SRSeedBurners on Thu Feb 24 12:35:27 2022
    On Wednesday, February 23, 2022 at 2:20:06 p.m. UTC-5, SRSeedBurners wrote:
    Have a question regarding the balancing of pathsend operations. We have multiple single process serverclasses which are doing pathsend operations to a serverclass which has four static processes (no dynamic) each running in its own CPU.

    Originally setup these destination serverclass processes are configured to handle 1/4 of the load and this was assuming the load would be spread somewhat evenly across the processes. However we are finding loads similar to the current production
    snapshot: CPU 0 14% - CPU 1 23% - 34% - 29%. During the day these percentages will shift to, for example: CPU 0 29%- CPU 1 34%-23%-12%. Initially I thought the load was due to the CPU that the senders were located on, but once I found that the load was
    distributed differently depending on when I took a snapshot, the senders never move CPU so can't be the cause.

    Is there a way to balance this from pathway perspective or totally out of our control?

    Consider looking into Pathway ACS. You can balance across PATHMON processes based on percentages. This sits on top of what Bill described regarding links. Look this up in the Pathway ACS manual.

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