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- Newsgroups: comp.databases.sybase
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!wupost!csus.edu!netcom.com!netcomsv!crenshaw!wall
- From: wall@mcm.com (Steve Wall)
- Subject: KILLed Sybase process will not die?
- Message-ID: <1993Jan5.192546.8743@mcm.com>
- Organization: Mellon Capital Management Corp. San Francisco, CA.
- Date: Tue, 5 Jan 1993 19:25:46 GMT
- Lines: 78
-
- Several times I've wanted to KILL a Sybase process with the
- equivalent of the UNIX kill -9 (die NOW!, no sig catch, etc.).
- Sybase gives you KILL, but under certain circumstance, the kill
- doesn't seem to take effect until some kind of variable delay
- (seems to be dependent on the type of process). Probably due
- to the Sybase kernel scheduler, resources in use by the proc,
- process run state (blocked or not), etc.
-
- For instance, this morning I have a DBCC process that is running
- later than usual due to delays up the pipeline (yes, I'm aware
- that DBCC in multiuser is not technically correct, and we interpret
- the results with this in mind), And now the DBCC is hogging the
- Server when people are trying to perform typical, daily queries.
- Thus, I want to KILL it since it is not mandatory that we get
- DBCC results every day.
-
- [Actually, the DBCC (spid=1) is blocking all my users due to locking
- on sysobjects (DBCC has a shared page lock on sysobjects
- page 2, my other proc (spid=10) is trying to get an Ex-table on
- sysobjects - see below). Why is DBCC locking sysobjects for so long?]
-
-
- sp_lock
- go
- spid locktype table_id page dbname
- ------ -------------------- ----------- ----------- ---------------
- 1 Sh_page-blk 1 2 idc
- 1 Sh_table 2000010156 0 idc
- 10 Ex_table-blk 1 0 idc
- 10 Ex_page 3 53 idc
- 26 Sh_intent 256003943 0 master
-
-
-
- sp_who
- spid status loginame hostname blk dbname cmd
- ------ ------------ ------------ ---------- --- ---------- ----------------
- 1 sleeping sa persian 0 idc DBCC
- 2 sleeping sa 0 master NETWORK HANDLER
- 3 sleeping sa 0 master MIRROR HANDLER
- 4 sleeping sa 0 master CHECKPOINT SLEEP
- 5 sleeping matt guava 0 ADMIN AWAITING COMMAND
- 6 sleeping beth 0 ADMIN AWAITING COMMAND
- 7 sleeping wall persian 10 idc AWAITING COMMAND
- 8 sleeping wall orange 10 idc AWAITING COMMAND
- 9 sleeping niklas orange 10 idc AWAITING COMMAND
- 10 sleeping ambrosia persian 1 idc AWAITING COMMAND
- 13 sleeping wall orange 10 idc AWAITING COMMAND
- 14 sleeping wall orange 10 idc AWAITING COMMAND
- 15 sleeping david 0 MARKETING AWAITING COMMAND
- 16 sleeping wall orange 10 idc AWAITING COMMAND
- 17 sleeping wall persian 10 idc AWAITING COMMAND
- 18 sleeping oneto orange 10 idc AWAITING COMMAND
- 19 sleeping wall persian 10 idc AWAITING COMMAND
- 20 sleeping wall persian 10 idc AWAITING COMMAND
- 21 sleeping pamb orange 10 idc AWAITING COMMAND
- 22 running sa persian 0 master SELECT
-
-
-
- Fun, huh? Kills to the DBCC do nothing. The kill requests are logged
- in the errorlog, so the server is getting them, but there is no effect.
- I'm also getting spurious invalid Sybase processe messages, so the
- server may be hung due to another error/bug.
-
- Whatever the case, my only resolution is to restart the server
- (shutdown with nowait) because I cannot kill the DBCC that everyone
- is blocked on.
-
- Any comments about these issues, especially the issue of when a
- KILL really takes effect, are appreciated.
-
- Steve
- --
-
- Steve Wall (wall@mcm.com)
- Mellon Capital Management Corporation
- San Francisco, CA
-