MSIR.0688 SirSafe enhanced shared DASD active on (%C) ((%C)) MSIR.0689 SirSafe Shared DASD visible system: (%C)

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This is an informational message that is issued whenever data has been compressed before being sent to a web client (browser). Compression probably isn't worth the trouble unless at least a 50% compression is achieved. Anything short of this suggests:

  • COMPRESS 2 should be used instead of COMPRESS 1. See COMPRESS (JANUS DEFINE parameter).
  • Inappropriate data is being compressed, most likely data that is already compressed such as GIF format data.
  • The data simply does not lend itself to compression. This is only likely in data that is rich in content and low in overhead. Presumably, such data is likely to be quite compact, anyway so doesn't require compression.