-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Tilman,
On 8/2/17 2:28 AM, Tilman Hausherr wrote: > Am 02.08.2017 um 01:17 schrieb Christopher Schultz: Tilman, > > On 8/1/17 4:42 PM, Tilman Hausherr wrote: >>>> Am 01.08.2017 um 22:09 schrieb Christopher Schultz: Tilman, >>>> >>>> On 8/1/17 3:22 PM, Tilman Hausherr wrote: >>>>>>> The only thing that comes close to what you want is to >>>>>>> create your PDDocument with >>>>>>> MemoryUsageSetting.setupMixed(...) as parameter. >>>> So that we can buffer to disk if the in-memory representation >>>> gets too big? That sounds like a good approach, and probably >>>> the most useful to m e. >>>> >>>> It also appears that I can set a maximum in-memory limit >>>> like this: >>>> >>>> MemoryUsageSetting mus = >>>> MemoryUsageSetting.setupMainMemoryOnly(1 * 1024 * 1024); >>>> PDDocument doc = new PDDocument(mus); >>>> >>>>> Yes. Although this would mean you'd get an exception if you >>>>> use more. That's why I recommend the mixed one. You could >>>>> use the memory limit for stress tests, i.e. create the >>>>> "worst" possible file and see what you need. > I think I'm okay with an exception in these cases. As I said, our > PDFs only end up being a few kiB in size, so I've put a 1MiB cap on > the memory-only memory usage strategy for the time being. > > I'm curious about what's being constrained, here... does PDFBox > estimate its current memory-usage of various PD* objects in memory > and push to disk when that's exceeded, or does it just limit the > amount of memory that gets used when serializing out to a stream. > >> There is no estimate... it writes in the dedicated space and if >> it is full, it's either exception (if memory only) or writing to >> disk cache. I get that, but I want to understand exactly what things are "counted". >> Yes... it's mostly images, fonts and page content streams. So, if I write an image to the PDDocument, that "counts" towards the memory/disk limits? What about plain text? Or the PDPage/PDPageContentStreams? If I write 1000 pages of plain-text to the PDDocument object, will that "fill up" the limited-memory I have configured? Or does that memory limit only count when e.g. serializing to a "compiled" PDF file (or whatever the right terminology is)? >> [Using built-in fonts] is even better, because it doesn't use any >> additional space (and is faster too). Your application is a >> very simple one :-) Yes, we are just taking some raw information and exporting it as a PDF. We wanted something simple AND we wanted to have file sizes as small as possible. I have a related question about fonts, but I'll ask that in a separate thread. >> You really should worry about other things... choose one or >> many: climate change, russian hackers, terrorism, rising interest >> rates, traffic jams, heavy rain flooding your basement, people >> who don't wash their hands, whatever :-) Who says I'm not a Russian hacker/taxi driver/hedge fund manager who pours truckloads of water on people's houses without warning? - -chris -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJZgdbbAAoJEBzwKT+lPKRYQqwQALgwGrOVs2imMdDSMmk9dwNm dFoVemVdXVnBvAdlF6tTosKIIKo9jDs2csxpcsOXnug/GytFGxR7NKWF8MRzBHf1 RulHwtarKxBRYef0jiPOOcrXLRxtQL3GWMEpQl+pZGIyBkh9DVvsUNnqQyaew3CF UiXMekauOq6yLpV3MSVFPF1Wh+jKKVwVG/3rhrEPFhuS22TSTyWbHkNlgky2PwJs wMt3tMJQpe3PWQtEWXETJc119n97mmt9RtifcuNIcCV9k8/+RO0U+NpXfZzYYS68 WTl9f60iHeMvrAkfiK1QpwgY6HvvyZRDuLAk+45kopJjR7tlHS6L20f3YsYAyYPK fWIrEm2glFOv4IPwbzQzP9DM7p3ti41i8E41zcvVT7hUv541tfEB/xdMTZgIA/m4 1Km1jp2Vdww1GyjT+llLswxnh+JAPQlk4lGippdxy7HLFzSqzS9XV2uBZdpQcpjx 28VuR/3idYtl7IVByQjtsNQsbuPApREqv45Za06Q08r2wXEgbc0mV6kuSTY9NyDQ OMD6Df+rbZlKRZyHFAXAGgTcRMdxhcYkW6UFr9XWlpPFi2jGnkIGW920p/9cFd7U o2nmRVDPJBPhqWtEG3702fU1FFvouqWH4isb3lsPxawY4mk8ixFzXQiU/9TiaOkF MUMfRfwBSW/ukkWPgj4t =+oM3 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
