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EX4300 pfex process exceeding 85% of RLIMIT_DATA

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  • 1.  EX4300 pfex process exceeding 85% of RLIMIT_DATA

    Posted 05-14-2021 06:15
    Hi all,

    we have recently started seeing the following lines in the logs after upgrading the EX4300 virtual switch chassis(4 members) to version 19.1R3.9:

    May 14 10:58:06 EX4300 /kernel: Process (1818,pfex_junos) has exceeded 85% of RLIMIT_DATA: used 487324 KB Max 524288 KB

    The line pops up periodically on the switch(in general a few times in an hour). Since the upgrade there have been no significant changes on the switch except port configuration changes(mostly VLAN membership, LACP configurations, ....).

    Doing some additional work per this document I attach the following output:

    show chassis routing-engine
    Routing Engine status:
    Slot 0:
    Current state Master
    Temperature 54 degrees C / 129 degrees F
    CPU temperature 54 degrees C / 129 degrees F
    DRAM 2048 MB
    Memory utilization 73 percent
    5 sec CPU utilization:
    User 9 percent
    Background 0 percent
    Kernel 5 percent
    Interrupt 0 percent
    Idle 86 percent
    Model EX4300-48T
    Serial ID
    Start time 2021-04-29 03:34:30 CEST
    Uptime 15 days, 8 hours, 29 minutes
    Last reboot reason Router rebooted after a normal shutdown.
    Load averages: 1 minute 5 minute 15 minute
    0.24 0.27 0.27
    Routing Engine status:
    Slot 1:
    Current state Backup
    Temperature 57 degrees C / 134 degrees F
    CPU temperature 57 degrees C / 134 degrees F
    DRAM 2048 MB
    Memory utilization 56 percent
    5 sec CPU utilization:
    User 8 percent
    Background 0 percent
    Kernel 4 percent
    Interrupt 0 percent
    Idle 89 percent
    Model EX4300-48T
    Serial ID
    Start time 2021-04-29 03:34:39 CEST
    Uptime 15 days, 8 hours, 28 minutes, 56 seconds
    Last reboot reason Router rebooted after a normal shutdown.
    Load averages: 1 minute 5 minute 15 minute
    0.26 0.25 0.18

    show system processes extensive | match pfex_junos
    1818 root 46 0 646M 227M RUN 62.7H 6.15% pfex_junos
    1818 root -52 -52 646M 227M select 62.7H 2.05% pfex_junos

    Memory utilization seems a bit high but this could be because the virtual chassis is about 80% full(correct me if I'm wrong). The switch itself works fine, there are no complaints that the connected servers are having any problems or lag issues. The only minor complaint is that the switch seems a bit slower when doing commit check and commit commands.

    Is this something to worry about and investigate further or is this normal behavior on this Junos version?


  • 2.  RE: EX4300 pfex process exceeding 85% of RLIMIT_DATA
    Best Answer

    Posted 06-04-2021 04:16
    Hi all,

    just info on this issue. I eventually raised a case with TAC and they gave me the following answer:

    We have found an ongoing PR investigation regarding the "Process (1693,pfex_junos) has exceeded 85% of RLIMIT_DATA: used 487324 KB Max 524288 KB" messages, this PR is not public yet but we see on the notes that the fix has been included in these releases:

     

    junos:18.4R2-S5

    junos:19.1R3-S3

    junos:19.3R3

    junos:19.4R3

    junos:20.1R2

    junos:20.2R2

    junos:20.3R1

    junos:20.4R1

    After upgrading to one of the recommended versions the issue is resolved.