Interesting PGA/Memory puzzle (4030 error at 32GB used) - ulimit settings?
Date: Fri, 18 May 2018 11:53:46 -0500
Message-ID: <CAP79kiSvooKC4zAyrEqPjKg8jFTdbB4jfngckGrFpzUGJA+7Kw_at_mail.gmail.com>
Env: 12.1.0.2 on Linux 7.4 64-bit
So, I've been all over Oracle support and Google-ing this morning trying to determine a root cause for this:
Here's the error and its always 32GB (ulimit settings to follow). Oracle doesn't have any support docs for KOLLRSZ.
The reason I'm wondering about ulimits kicking in is because its always at 32GB. I'm betting its a memory leak but I'd like to overcome this seeming 32GB barrier.
[TOC00001]
ORA-04030: out of process memory when trying to allocate 16328 bytes
(koh-kghu sessi,kollrsz)
[TOC00001-END]
[TOC00002]
========= Dump for incident 931836 (ORA 4030) ========
[TOC00003]
----- Beginning of Customized Incident Dump(s) -----
TOP 10 MEMORY USES FOR THIS PROCESS
- 2018-05-18 12:33:30.917 *100% 32 GB, 2087947 chunks: "kollrsz "* * koh-kghu sessi ds=0x7f8047e4f178 dsprt=0x7f804ae4cf60* 0% 9688 KB, 77 chunks: "kllcqas:kllsltba " SQL QERHJ hash-joi ds=0x7f8048f2dc40 dsprt=0x7f804a5ab710 0% 4333 KB, 50 chunks: "permanent memory " SQL kxs-heap-w ds=0x7f804a5ab710 dsprt=0x7f804ae4cf60 0% 2503 KB, 18 chunks: "QERHJ list array " SQL QERHJ hash-joi ds=0x7f804a61dc30 dsprt=0x7f804a5ab710 0% 2432 KB, 7 chunks: "HT buckets " SQL QERHJ hash-joi ds=0x7f804a61dc30 dsprt=0x7f804a5ab710 0% 2056 KB, 2 chunks: "kllcqgf:kllsltba " klcliti:kghds ds=0x7f80491e9e10 dsprt=0x7f804f9a09e0 0% 1537 KB, 56 chunks: "QERHJ Bit vector " SQL QERHJ hash-joi ds=0x7f8048f2dc40 dsprt=0x7f804a5ab710 0% 1381 KB, 66 chunks: "free memory " SQL QERHJ hash-joi ds=0x7f804a61dc30 dsprt=0x7f804a5ab710 0% 1213 KB, 27 chunks: "free memory " top call heap ds=0x7f804f9a1be0 dsprt=(nil) 0% 1046 KB, 73 chunks: "free memory " top uga heap ds=0x7f804f9a1e00 dsprt=(nil)
I'm wondering if there's a parameter at the OS layer limiting the session to 32GB
ulimit -a
core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 16506448 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 131072 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200real-time priority (-r) 0 stack size (kbytes, -s) 32768 cpu time (seconds, -t) unlimited max user processes (-u) 131072 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
PGA Settings are as follows on this Data Warehouse:
NAME TYPE VALUE ------------------------------------ ----------- ------------ pga_aggregate_limit big integer 128G pga_aggregate_target big integer 8G
-- http://www.freelists.org/webpage/oracle-lReceived on Fri May 18 2018 - 18:53:46 CEST