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https://issues.apache.org/jira/browse/LUCENE-9160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17021745#comment-17021745
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David Smiley commented on LUCENE-9160:
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I don't have the psutil module and I'm not versed in python but I ran lscpu:
{noformat}
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                16
On-line CPU(s) list:   0-15
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             16
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 61
Model name:            Intel Core Processor (Broadwell)
Stepping:              2
CPU MHz:               2397.222
BogoMIPS:              4794.44
Virtualization:        VT-x
Hypervisor vendor:     KVM
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              4096K
L3 cache:              16384K
NUMA node0 CPU(s):     0-15
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm 
constant_tsc rep_good nopl xtopology eagerfpu pni pclmulqdq vmx ssse3 fma cx16 
pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c 
rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single tpr_shadow vnmi 
flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid 
rtm rdseed adx smap xsaveopt arat
{noformat}
(and 48GB of RAM)

> override heap / jvm params for tests in gradle build
> ----------------------------------------------------
>
>                 Key: LUCENE-9160
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9160
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>            Priority: Major
>             Fix For: master (9.0)
>
>         Attachments: LUCENE-9160.patch, LUCENE-9160.patch
>
>
> Currently the gradle.properties that is generated lets you control the heap 
> and flags for the gradle build jvms.
> But there is no way to control these flags for the actual forked VMs running 
> the unit tests. For example, minHeap is hardcoded at 256m and maxHeap at 
> 512m. 
> I would like to change minHeap to 512m as well, for a fixed heap, and set 
> some other jvm flags, such as {{-XX:+UseParallelGC}} so that my tests are not 
> slow for silly reasons :)
> I think it is stuff jenkins CI would need as well. 



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