atproto relay implementation in zig
zlay.waow.tech
add malloc_trim(0) to GC loop — diagnostic for RSS fragmentation
calls malloc_trim(0) every 10 minutes to ask glibc to return free
pages to the OS. if RSS drops after each trim, the linear growth is
malloc fragmentation rather than a true leak.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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src/main.zig
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src/main.zig
···
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log.info("relay stopped cleanly", .{});
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}
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const malloc_h = @cImport(@cInclude("malloc.h"));
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fn gcLoop(dp: *event_log_mod.DiskPersist) void {
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const gc_interval: u64 = 10 * 60; // 10 minutes in seconds
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while (!shutdown_flag.load(.acquire)) {
···
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dp.gc() catch |err| {
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log.warn("event log GC failed: {s}", .{@errorName(err)});
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};
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// ask glibc to return free pages to the OS — diagnostic for malloc fragmentation.
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// if RSS drops after each trim, the growth is fragmentation, not a leak.
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_ = malloc_h.malloc_trim(0);
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log.info("gc: malloc_trim complete", .{});
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}
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}
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