Easiest thing I would do is find that processes PID by querying the pg_stat_activity table, then invoke “select from pg_terminate_backend(pid#); where of course, you put the determined PID from your first query into those parenthesis. — Jay Sent from my iPad > On Sep 11, 2020, at 9:08 AM, Jerry Sievers <gsievers19@xxxxxxxxxxx> wrote: > > Greetings! One of my $power users launched big-nasty job on our ~50TB > warehouse. > > Long-running jobs on that box aren't unusual, however this one we want > stopped and it's unresponsive to cancel or terminate signalling for > several hours. > > Below are 10 lines captured by running strace over each of the PIDs. > > What else to look for before we stop-immediate the system? > > Thx! > > PS: Will repost w/gdb output as soon as I can remember how to run it for > a case like this :-) > > > > PostgreSQL 11.7 (Ubuntu 11.7-2.pgdg16.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609, 64-bit > > > > # echo $# > 9 > > # for p; do strace -p $p 2>&1 | head -10; echo; done > strace: Process 42079 attached > strace: [ Process PID=42079 runs in x32 mode. ] > strace: [ Process PID=42079 runs in 64 bit mode. ] > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8219365000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8214364000 > munmap(0x7f8219365000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81ff856000 > munmap(0x7f8214364000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81eb855000 > munmap(0x7f81ff856000, 167776256) = 0 > > strace: Process 42372 attached > strace: [ Process PID=42372 runs in x32 mode. ] > strace: [ Process PID=42372 runs in 64 bit mode. ] > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > munmap(0x7f81fdafb000, 167776256) = 0 > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8219a0b000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8214a0a000 > munmap(0x7f8219a0b000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > > strace: Process 42373 attached > strace: [ Process PID=42373 runs in x32 mode. ] > strace: [ Process PID=42373 runs in 64 bit mode. ] > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8217a0a000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8212a09000 > munmap(0x7f8217a0a000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8212a09000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > > strace: Process 42374 attached > strace: [ Process PID=42374 runs in x32 mode. ] > strace: [ Process PID=42374 runs in 64 bit mode. ] > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8219a0b000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8214a0a000 > munmap(0x7f8219a0b000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8214a0a000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > > strace: Process 42375 attached > strace: [ Process PID=42375 runs in x32 mode. ] > strace: [ Process PID=42375 runs in 64 bit mode. ] > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8219a0b000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8214a0a000 > munmap(0x7f8219a0b000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8214a0a000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > > strace: Process 42376 attached > strace: [ Process PID=42376 runs in x32 mode. ] > strace: [ Process PID=42376 runs in 64 bit mode. ] > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8217a0a000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8212a09000 > munmap(0x7f8217a0a000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8212a09000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > > strace: Process 42377 attached > munmap(0x7f81fdafb000, 167776256) = 0 > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8217a0a000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8212a09000 > munmap(0x7f8217a0a000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8212a09000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > munmap(0x7f81fdafb000, 167776256) = 0 > > strace: Process 42378 attached > strace: [ Process PID=42378 runs in x32 mode. ] > strace: [ Process PID=42378 runs in 64 bit mode. ] > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8214a0a000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > munmap(0x7f81fdafb000, 167776256) = 0 > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8219a0b000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8214a0a000 > > strace: Process 42379 attached > strace: [ Process PID=42379 runs in x32 mode. ] > strace: [ Process PID=42379 runs in 64 bit mode. ] > munmap(0x7f81e9afa000, 335548416) = 0 > mmap(NULL, 41947136, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8217a0a000 > mmap(NULL, 83890176, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8212a09000 > munmap(0x7f8217a0a000, 41947136) = 0 > mmap(NULL, 167776256, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fdafb000 > munmap(0x7f8212a09000, 83890176) = 0 > mmap(NULL, 335548416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81e9afa000 > > > > > -- > Jerry Sievers > Postgres DBA/Development Consulting > e: postgres.consulting@xxxxxxxxxxx > >
