Synchronous SVC dump: The requester’s SVC dump macro invocation issues an instruction to obtain the dump under the current task. The system returns control to the requester once the dump data has been captured into a set of data spaces. SVC dump processing then writes the dump data from the data spaces into a dump data set. The system is available for another SVC dump upon completion of the.
When z/OS® takes an SVC dump, it copies data into the DUMPSRV owned data spaces and high virtual storage. The collection of data can introduce an unusually heavy burden on storage resources. The virtual storage load remains until the dump is written out to a target data set on DASD.
The DUMP command requests a system dump ( SVC dump ) of virtual storage. The SVC dump is stored in a direct access data set. The data set may be either a pre-allocated dump data set named SYS1.DUMPxx, or an automatically allocated dump data set.
SVC dumps contain a summary dump, control blocks, and other system code, but the exact areas dumped depend on whether the dump was requested by a macro, command, or SLIP trap. SVC dumps can be analyzed using IPCS. SVC dump processing stores data in dump data sets that you pre-allocate manually, or that the system allocates automatically, as needed.
z/OS Abstract: Recently a series of SVC dump measurements were conducted by the zSeries performance team using the LSPR (Large Systems Performance Reference) CICS/DB2 workload. The purpose of the measurements were to establish a baseline for SVC dump performance in terms of dump collection time, and IPCS initialization time at the latest …
z/OS R12 – SVC Dump Capture Solution • Reduce memory pressure when capturing exit data • Do a smart copy such that if the source data is out on AUX we do an I/O directly into the SDUMP buffer space to capture the data while leaving the source data out on AUX •.
See z/OS MVS System Messages, Vol 6 (GOS-IEA) for the discussion in message IEA848I, DEADLOCK AVOIDED to find more information. Whenever the TIMEENQ value is changed, the new value takes effect immediately. A value of 0 does not force an SVC dump to occur, because the resources required might be immediately available.
CA Common Services for z/OS 14.1: Fix Category: CA.TargetSystem-RequiredService. z/OS .V2R3. Resource Initialization Manager (CAS9E10) RO93293 RO94935 RO95015 CAMASTER/CA-SERV COMMON SERVICE (CEI0E10) RO94936. I encourage you to apply all these PTFs to be full compatible with z/OS 2.3 and get rid of this kind of problems.
SVC dump An SVC dump provides a representation of the virtual storage for the system when an error occurs. Typically, a system component requests the dump from a recovery routine when an unexpected error occurs. However, an authorized program or the operator can also request an SVC dump when diagnostic dump data is needed to solve a problem.
z/OS V1R12.0 DFSMSdfp Diagnosis GY27-7618-13 The following table describes the various types of dumps. If a dump is known by more than one name, the table also mentions the alternate name. For a sample of the kind of information in the formatted portion of a typical SVC dump , see Abend keyword. The following table describes the various types of …
