I have a bunch of data I am trying to store in shared memory which is basically a vector of bytes + a vector of some metadata; both vectors, in general, grow as time goes on at an unpredictable rate, until someone stops using them. The vector lengths are extremely variable; total amount of shared memory could be as small as 10K and as large as several hundred megabytes. I will not know beforehand the amount needed.<br>
<br>From what I understand about Boost shared memory segments, they are not infinitely growable, so I think I have to organize my data into chunks of a more reasonable size, and allocate a series of separate shared memory segments with a few chunks in each. (there are other application-specific reasons for me to do this anyway) So I am trying to figure out what is a reasonable size is of shared memory to allocate. (probably in the 64K - 1MB range but I&#39;m not sure)<br>
<br>Does anyone have any information about the overhead of a shared memory segment? Just an order of magnitude estimate, e.g. M bytes fixed + N bytes per object allocated + total size of names. Are M,N on the order of 10 bytes or 10Kbytes or what?<br>