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From |
"Sergiy Radyakin" <serjradyakin@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: insufficient memory for matrix 11 r(950) |

Date |
Tue, 29 Jul 2008 13:50:24 -0400 |

Dear Jennifer, matrices are stored in a separate memory location from data. By expanding the memory allocated for data, you are making things WORSE, eating up memory, which could otherwise be used to store your matrices. Also, do not neglect estimating how much memory you are about to consume: di 8*438*438*1100/1024/1024 1610.0189 ^^^^^^^^^^^^^^^^^MB Actual consumption is necessarily larger, because of an overhead. Perhaps someone from Stata, Corp could clarify how much of an overhead is present, but I guess you must account for R*4*33 bytes for row and column names (here R is from set matsize R), but then the estimate overshoots the value reported in maxsize usage. If you are using Stata 32 - you probably have a very small chance of storing all these matrices simultaneously. Note that when you request a memory use report ( -memory- ) memory consumption is split into two parts: data and other. Grand total must be however always <2GB on a 32-bit machine, and in practice quite a lot less. Hope this helps. Best regards, Sergiy Radyakin On 7/29/08, Victor, Jennifer Nicoll <jnvictor@pitt.edu> wrote: > I am receiving a memory error while trying to create (and store) many matrices simultaneously. Increasing the memory allocation to Stata (set mem 1g) does not help. Essentially, I am taking an nx1 vector and multiplying it by its transpose to create a 438x438 matrix. I'm doing this 1100 times and then need to add all 1100 matrices together. State gives me the error "insufficient memory for matrix 11 r(950)" around matrix 440 (or 700 depending on the trial). Advice? > > ___________________________________________ > Jennifer Nicoll Victor > Assistant Professor > Department of Political Science > University of Pittsburgh > 4600 Wesley W. Posvar Hall > (412) 624-7204 > E-mail: jnvictor@pitt.edu > Homepage: http://www.pitt.edu/~jnvictor > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: insufficient memory for matrix 11 r(950)***From:*"Victor, Jennifer Nicoll" <jnvictor@pitt.edu>

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