{"id":32654,"date":"2019-01-15T03:05:33","date_gmt":"2019-01-15T03:05:33","guid":{"rendered":"\/forum\/forums\/topic\/massive-amount-of-memory-ram-required-for-solve\/"},"modified":"2019-01-15T03:05:33","modified_gmt":"2019-01-15T03:05:33","slug":"massive-amount-of-memory-ram-required-for-solve","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/massive-amount-of-memory-ram-required-for-solve\/","title":{"rendered":"Massive amount of memory (RAM) required for solve"},"content":{"rendered":"

Hi there,<\/p>\n

<\/p>\n

I am skeptical about the amount of memory required to solve my model.<\/p>\n

<\/p>\n

I have a 3D model consisting of mostly SOLID186 elements (520,936) with some SHELL181 elements (10580), for a total of 2,160,651 nodes. I also have two bonded and one frictionless contacts in the model, which add 45,366 contact elements. It is a Static Structural model.<\/p>\n

<\/p>\n

When I run my model, I receive this error:<\/p>\n

<\/p>\n

 *** ERROR ***                           <\/p>\n

<\/p>\n

 There is not enough memory for the Distributed Sparse Matrix Solver to proceed using the out-of-core memory mode.  The total memory required by all processes = 40993 MB.  The total physical memory that is available on the system = 15435 MB.  Please decrease the model size, or run this model on another system with more physical memory.<\/p>\n

<\/p>\n

Does 40GB of memory seem reasonable for a model of this size?<\/p>\n

<\/p>\n

Section ‘5.2 Types of Solvers’ of the ANSYS manual says that out-of-core mode typically requires around 1 GB per million DOFs, which means that I should only need ~6.5GB (3 DOFs per node). <\/p>\n

<\/p>\n

Let me know know if attaching my model would help.<\/p>\n

<\/p>\n

Does the excessive memory requirement suggest that there is something wrong with my model? This this amount of required memory reasonable?<\/span><\/p>\n

<\/p>\n

I only have two other warnings in my model, but I think that I can ignore them:<\/p>\n

<\/p>\n

1. Element shape checking is currently inactive.  Issue SHPP,ON or SHPP,WARN to reactivate, if desired.  <\/p>\n

<\/p>\n

2. Material number 29 (used by element 575553 ) should normally have at least one MP or one TB type command associated with it.  Output of energy by material may not be available. <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

Kind regards,<\/p>\n

<\/p>\n

Kai-Yeung<\/p>\n

<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-32654","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["4826"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["10666"],"_bbp_subscription":["238078","287250"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["32654"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","69632","156586","177316","287250"],"_bbp_voice_count":["5"],"_bbp_reply_count":["13"],"_bbp_last_reply_id":["288675"],"_bbp_last_active_id":["288675"],"_bbp_last_active_time":["2023-06-14 10:33:20"]},"test":"kaiyeungli"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32654","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32654\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=32654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}