| Related Documentation | Version of up.time \naffected | Affected Platforms |
| IOException: Not enough space (Java heap) \n | v7.0 and earlier | All |
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| Warning |
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| The following information is applicable to earlier versions of |
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| Uptime Infrastructure Monitor. |
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| If you are using |
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| Uptime Infrastructure Monitor 7.X, refer to the |
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| Uptime Infrastructure Monitor product documentation for the latest information. |
The Java heap is a repository for Java objects and free memory. The Java heap size should generally be increased when you have:
- A large number of service monitors.
- A large number of reports to run.
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Adjusting the Java Heap Size
uptime is installed with a default Java Heap Size value of 1 Gb. For optimal performance, a value of 1.5 Gb is usually recommended.
| Note |
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| When increasing the Java Heap Size, ensure that the Operating System can support the new setting. If the OS does not have the desired amount of memory available exclusively for up.timeUptime Infrastructure Monitor, the up.time Uptime Infrastructure Monitor core will fail on startup. |
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To change the Java Heap Size, modify the <uptime install dir>/uptime.lax (or uptime4d.lax in up.time Uptime Infrastructure Monitor 4) file to look like this:
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